chore: Update discovery artifacts (#1462)

## Deleted keys were detected in the following stable discovery artifacts:
sqladmin v1 https://github.com/googleapis/google-api-python-client/commit/cef24d829ab5be71563a2b668b8f6cf5dda2c8e4

## Deleted keys were detected in the following pre-stable discovery artifacts:
alertcenter v1beta1 https://github.com/googleapis/google-api-python-client/commit/70810a52c85c6d0d6f00d7afb41c8608261eaebc

## Discovery Artifact Change Summary:
feat(alertcenter): update the api https://github.com/googleapis/google-api-python-client/commit/70810a52c85c6d0d6f00d7afb41c8608261eaebc
feat(chat): update the api https://github.com/googleapis/google-api-python-client/commit/a577cd0b71951176bbf849c1f7f139127205da54
feat(cloudbuild): update the api https://github.com/googleapis/google-api-python-client/commit/9066056a8b106d441fb7686fe84359484d0d58bc
feat(content): update the api https://github.com/googleapis/google-api-python-client/commit/b123349da33c11c0172a8efb3fadef685a30e6e1
feat(displayvideo): update the api https://github.com/googleapis/google-api-python-client/commit/c525d726ee6cffdd4bc7afd69080d5e52bae83a0
feat(dns): update the api https://github.com/googleapis/google-api-python-client/commit/13436ccd2b835fda5cb86952ac4ea991ee8651d8
feat(eventarc): update the api https://github.com/googleapis/google-api-python-client/commit/6be3394a64a5eb509f68ef779680fd36837708ee
feat(file): update the api https://github.com/googleapis/google-api-python-client/commit/817a0e636771445a988ef479bd52740f754b901a
feat(monitoring): update the api https://github.com/googleapis/google-api-python-client/commit/bd32149f308467f0f659119587afc77dcec65b14
feat(people): update the api https://github.com/googleapis/google-api-python-client/commit/aa6b47df40c5289f33aef6fb6aa007df2d038e20
feat(retail): update the api https://github.com/googleapis/google-api-python-client/commit/d39f06e2d77034bc837604a41dd52c577f158bf2
feat(securitycenter): update the api https://github.com/googleapis/google-api-python-client/commit/999fab5178208639c9eef289f9f441052ed832fc
feat(speech): update the api https://github.com/googleapis/google-api-python-client/commit/3b2c0fa62b2a0c86bba1e97f1b18f93250dbd551
feat(sqladmin): update the api https://github.com/googleapis/google-api-python-client/commit/cef24d829ab5be71563a2b668b8f6cf5dda2c8e4
diff --git a/docs/dyn/run_v1.namespaces.services.html b/docs/dyn/run_v1.namespaces.services.html
index fac7856..c3f1735 100644
--- a/docs/dyn/run_v1.namespaces.services.html
+++ b/docs/dyn/run_v1.namespaces.services.html
@@ -177,7 +177,7 @@
         "uid": "A String", # (Optional) UID is the unique in time and space value for this object. It is typically generated by the server on successful creation of a resource and is not allowed to change on PUT operations. Populated by the system. Read-only. More info: http://kubernetes.io/docs/user-guide/identifiers#uids
       },
       "spec": { # RevisionSpec holds the desired state of the Revision (from the client). # RevisionSpec holds the desired state of the Revision (from the client).
-        "containerConcurrency": 42, # (Optional) ContainerConcurrency specifies the maximum allowed in-flight (concurrent) requests per container instance of the Revision. Cloud Run fully managed: supported, defaults to 80 Cloud Run for Anthos: supported, defaults to 0, which means concurrency to the application is not limited, and the system decides the target concurrency for the autoscaler.
+        "containerConcurrency": 42, # Optional. ContainerConcurrency specifies the maximum allowed in-flight (concurrent) requests per container instance of the Revision. Cloud Run fully managed: supported, defaults to 80 Cloud Run for Anthos: supported, defaults to 0, which means concurrency to the application is not limited, and the system decides the target concurrency for the autoscaler.
         "containers": [ # Containers holds the single container that defines the unit of execution for this Revision. In the context of a Revision, we disallow a number of fields on this Container, including: name and lifecycle. In Cloud Run, only a single container may be provided. The runtime contract is documented here: https://github.com/knative/serving/blob/master/docs/runtime-contract.md
           { # A single application container. This specifies both the container to run, the command to run in the container and the arguments to supply to it. Note that additional arguments may be supplied by the system to the container at runtime.
             "args": [ # (Optional) Arguments to the entrypoint. The docker image's CMD is used if this is not provided. Variable references $(VAR_NAME) are expanded using the container's environment. If a variable cannot be resolved, the reference in the input string will be unchanged. The $(VAR_NAME) syntax can be escaped with a double $$, ie: $$(VAR_NAME). Escaped references will never be expanded, regardless of whether the variable exists or not. More info: https://kubernetes.io/docs/tasks/inject-data-application/define-command-argument-container/#running-a-command-in-a-shell
@@ -380,10 +380,10 @@
     "traffic": [ # Traffic specifies how to distribute traffic over a collection of Knative Revisions and Configurations.
       { # TrafficTarget holds a single entry of the routing table for a Route.
         "configurationName": "A String", # ConfigurationName of a configuration to whose latest revision we will send this portion of traffic. When the "status.latestReadyRevisionName" of the referenced configuration changes, we will automatically migrate traffic from the prior "latest ready" revision to the new one. This field is never set in Route's status, only its spec. This is mutually exclusive with RevisionName. Cloud Run currently supports a single ConfigurationName.
-        "latestRevision": True or False, # LatestRevision may be optionally provided to indicate that the latest ready Revision of the Configuration should be used for this traffic target. When provided LatestRevision must be true if RevisionName is empty; it must be false when RevisionName is non-empty. +optional
+        "latestRevision": True or False, # Optional. LatestRevision may be provided to indicate that the latest ready Revision of the Configuration should be used for this traffic target. When provided LatestRevision must be true if RevisionName is empty; it must be false when RevisionName is non-empty.
         "percent": 42, # Percent specifies percent of the traffic to this Revision or Configuration. This defaults to zero if unspecified. Cloud Run currently requires 100 percent for a single ConfigurationName TrafficTarget entry.
         "revisionName": "A String", # RevisionName of a specific revision to which to send this portion of traffic. This is mutually exclusive with ConfigurationName. Providing RevisionName in spec is not currently supported by Cloud Run.
-        "tag": "A String", # Tag is optionally used to expose a dedicated url for referencing this target exclusively. +optional
+        "tag": "A String", # Optional. Tag is used to expose a dedicated url for referencing this target exclusively.
         "url": "A String", # Output only. URL displays the URL for accessing tagged traffic targets. URL is displayed in status, and is disallowed on spec. URL must contain a scheme (e.g. http://) and a hostname, but may not contain anything else (e.g. basic auth, url path, etc.)
       },
     ],
@@ -408,10 +408,10 @@
     "traffic": [ # From RouteStatus. Traffic holds the configured traffic distribution. These entries will always contain RevisionName references. When ConfigurationName appears in the spec, this will hold the LatestReadyRevisionName that we last observed.
       { # TrafficTarget holds a single entry of the routing table for a Route.
         "configurationName": "A String", # ConfigurationName of a configuration to whose latest revision we will send this portion of traffic. When the "status.latestReadyRevisionName" of the referenced configuration changes, we will automatically migrate traffic from the prior "latest ready" revision to the new one. This field is never set in Route's status, only its spec. This is mutually exclusive with RevisionName. Cloud Run currently supports a single ConfigurationName.
-        "latestRevision": True or False, # LatestRevision may be optionally provided to indicate that the latest ready Revision of the Configuration should be used for this traffic target. When provided LatestRevision must be true if RevisionName is empty; it must be false when RevisionName is non-empty. +optional
+        "latestRevision": True or False, # Optional. LatestRevision may be provided to indicate that the latest ready Revision of the Configuration should be used for this traffic target. When provided LatestRevision must be true if RevisionName is empty; it must be false when RevisionName is non-empty.
         "percent": 42, # Percent specifies percent of the traffic to this Revision or Configuration. This defaults to zero if unspecified. Cloud Run currently requires 100 percent for a single ConfigurationName TrafficTarget entry.
         "revisionName": "A String", # RevisionName of a specific revision to which to send this portion of traffic. This is mutually exclusive with ConfigurationName. Providing RevisionName in spec is not currently supported by Cloud Run.
-        "tag": "A String", # Tag is optionally used to expose a dedicated url for referencing this target exclusively. +optional
+        "tag": "A String", # Optional. Tag is used to expose a dedicated url for referencing this target exclusively.
         "url": "A String", # Output only. URL displays the URL for accessing tagged traffic targets. URL is displayed in status, and is disallowed on spec. URL must contain a scheme (e.g. http://) and a hostname, but may not contain anything else (e.g. basic auth, url path, etc.)
       },
     ],
@@ -498,7 +498,7 @@
         "uid": "A String", # (Optional) UID is the unique in time and space value for this object. It is typically generated by the server on successful creation of a resource and is not allowed to change on PUT operations. Populated by the system. Read-only. More info: http://kubernetes.io/docs/user-guide/identifiers#uids
       },
       "spec": { # RevisionSpec holds the desired state of the Revision (from the client). # RevisionSpec holds the desired state of the Revision (from the client).
-        "containerConcurrency": 42, # (Optional) ContainerConcurrency specifies the maximum allowed in-flight (concurrent) requests per container instance of the Revision. Cloud Run fully managed: supported, defaults to 80 Cloud Run for Anthos: supported, defaults to 0, which means concurrency to the application is not limited, and the system decides the target concurrency for the autoscaler.
+        "containerConcurrency": 42, # Optional. ContainerConcurrency specifies the maximum allowed in-flight (concurrent) requests per container instance of the Revision. Cloud Run fully managed: supported, defaults to 80 Cloud Run for Anthos: supported, defaults to 0, which means concurrency to the application is not limited, and the system decides the target concurrency for the autoscaler.
         "containers": [ # Containers holds the single container that defines the unit of execution for this Revision. In the context of a Revision, we disallow a number of fields on this Container, including: name and lifecycle. In Cloud Run, only a single container may be provided. The runtime contract is documented here: https://github.com/knative/serving/blob/master/docs/runtime-contract.md
           { # A single application container. This specifies both the container to run, the command to run in the container and the arguments to supply to it. Note that additional arguments may be supplied by the system to the container at runtime.
             "args": [ # (Optional) Arguments to the entrypoint. The docker image's CMD is used if this is not provided. Variable references $(VAR_NAME) are expanded using the container's environment. If a variable cannot be resolved, the reference in the input string will be unchanged. The $(VAR_NAME) syntax can be escaped with a double $$, ie: $$(VAR_NAME). Escaped references will never be expanded, regardless of whether the variable exists or not. More info: https://kubernetes.io/docs/tasks/inject-data-application/define-command-argument-container/#running-a-command-in-a-shell
@@ -701,10 +701,10 @@
     "traffic": [ # Traffic specifies how to distribute traffic over a collection of Knative Revisions and Configurations.
       { # TrafficTarget holds a single entry of the routing table for a Route.
         "configurationName": "A String", # ConfigurationName of a configuration to whose latest revision we will send this portion of traffic. When the "status.latestReadyRevisionName" of the referenced configuration changes, we will automatically migrate traffic from the prior "latest ready" revision to the new one. This field is never set in Route's status, only its spec. This is mutually exclusive with RevisionName. Cloud Run currently supports a single ConfigurationName.
-        "latestRevision": True or False, # LatestRevision may be optionally provided to indicate that the latest ready Revision of the Configuration should be used for this traffic target. When provided LatestRevision must be true if RevisionName is empty; it must be false when RevisionName is non-empty. +optional
+        "latestRevision": True or False, # Optional. LatestRevision may be provided to indicate that the latest ready Revision of the Configuration should be used for this traffic target. When provided LatestRevision must be true if RevisionName is empty; it must be false when RevisionName is non-empty.
         "percent": 42, # Percent specifies percent of the traffic to this Revision or Configuration. This defaults to zero if unspecified. Cloud Run currently requires 100 percent for a single ConfigurationName TrafficTarget entry.
         "revisionName": "A String", # RevisionName of a specific revision to which to send this portion of traffic. This is mutually exclusive with ConfigurationName. Providing RevisionName in spec is not currently supported by Cloud Run.
-        "tag": "A String", # Tag is optionally used to expose a dedicated url for referencing this target exclusively. +optional
+        "tag": "A String", # Optional. Tag is used to expose a dedicated url for referencing this target exclusively.
         "url": "A String", # Output only. URL displays the URL for accessing tagged traffic targets. URL is displayed in status, and is disallowed on spec. URL must contain a scheme (e.g. http://) and a hostname, but may not contain anything else (e.g. basic auth, url path, etc.)
       },
     ],
@@ -729,10 +729,10 @@
     "traffic": [ # From RouteStatus. Traffic holds the configured traffic distribution. These entries will always contain RevisionName references. When ConfigurationName appears in the spec, this will hold the LatestReadyRevisionName that we last observed.
       { # TrafficTarget holds a single entry of the routing table for a Route.
         "configurationName": "A String", # ConfigurationName of a configuration to whose latest revision we will send this portion of traffic. When the "status.latestReadyRevisionName" of the referenced configuration changes, we will automatically migrate traffic from the prior "latest ready" revision to the new one. This field is never set in Route's status, only its spec. This is mutually exclusive with RevisionName. Cloud Run currently supports a single ConfigurationName.
-        "latestRevision": True or False, # LatestRevision may be optionally provided to indicate that the latest ready Revision of the Configuration should be used for this traffic target. When provided LatestRevision must be true if RevisionName is empty; it must be false when RevisionName is non-empty. +optional
+        "latestRevision": True or False, # Optional. LatestRevision may be provided to indicate that the latest ready Revision of the Configuration should be used for this traffic target. When provided LatestRevision must be true if RevisionName is empty; it must be false when RevisionName is non-empty.
         "percent": 42, # Percent specifies percent of the traffic to this Revision or Configuration. This defaults to zero if unspecified. Cloud Run currently requires 100 percent for a single ConfigurationName TrafficTarget entry.
         "revisionName": "A String", # RevisionName of a specific revision to which to send this portion of traffic. This is mutually exclusive with ConfigurationName. Providing RevisionName in spec is not currently supported by Cloud Run.
-        "tag": "A String", # Tag is optionally used to expose a dedicated url for referencing this target exclusively. +optional
+        "tag": "A String", # Optional. Tag is used to expose a dedicated url for referencing this target exclusively.
         "url": "A String", # Output only. URL displays the URL for accessing tagged traffic targets. URL is displayed in status, and is disallowed on spec. URL must contain a scheme (e.g. http://) and a hostname, but may not contain anything else (e.g. basic auth, url path, etc.)
       },
     ],
@@ -870,7 +870,7 @@
         "uid": "A String", # (Optional) UID is the unique in time and space value for this object. It is typically generated by the server on successful creation of a resource and is not allowed to change on PUT operations. Populated by the system. Read-only. More info: http://kubernetes.io/docs/user-guide/identifiers#uids
       },
       "spec": { # RevisionSpec holds the desired state of the Revision (from the client). # RevisionSpec holds the desired state of the Revision (from the client).
-        "containerConcurrency": 42, # (Optional) ContainerConcurrency specifies the maximum allowed in-flight (concurrent) requests per container instance of the Revision. Cloud Run fully managed: supported, defaults to 80 Cloud Run for Anthos: supported, defaults to 0, which means concurrency to the application is not limited, and the system decides the target concurrency for the autoscaler.
+        "containerConcurrency": 42, # Optional. ContainerConcurrency specifies the maximum allowed in-flight (concurrent) requests per container instance of the Revision. Cloud Run fully managed: supported, defaults to 80 Cloud Run for Anthos: supported, defaults to 0, which means concurrency to the application is not limited, and the system decides the target concurrency for the autoscaler.
         "containers": [ # Containers holds the single container that defines the unit of execution for this Revision. In the context of a Revision, we disallow a number of fields on this Container, including: name and lifecycle. In Cloud Run, only a single container may be provided. The runtime contract is documented here: https://github.com/knative/serving/blob/master/docs/runtime-contract.md
           { # A single application container. This specifies both the container to run, the command to run in the container and the arguments to supply to it. Note that additional arguments may be supplied by the system to the container at runtime.
             "args": [ # (Optional) Arguments to the entrypoint. The docker image's CMD is used if this is not provided. Variable references $(VAR_NAME) are expanded using the container's environment. If a variable cannot be resolved, the reference in the input string will be unchanged. The $(VAR_NAME) syntax can be escaped with a double $$, ie: $$(VAR_NAME). Escaped references will never be expanded, regardless of whether the variable exists or not. More info: https://kubernetes.io/docs/tasks/inject-data-application/define-command-argument-container/#running-a-command-in-a-shell
@@ -1073,10 +1073,10 @@
     "traffic": [ # Traffic specifies how to distribute traffic over a collection of Knative Revisions and Configurations.
       { # TrafficTarget holds a single entry of the routing table for a Route.
         "configurationName": "A String", # ConfigurationName of a configuration to whose latest revision we will send this portion of traffic. When the "status.latestReadyRevisionName" of the referenced configuration changes, we will automatically migrate traffic from the prior "latest ready" revision to the new one. This field is never set in Route's status, only its spec. This is mutually exclusive with RevisionName. Cloud Run currently supports a single ConfigurationName.
-        "latestRevision": True or False, # LatestRevision may be optionally provided to indicate that the latest ready Revision of the Configuration should be used for this traffic target. When provided LatestRevision must be true if RevisionName is empty; it must be false when RevisionName is non-empty. +optional
+        "latestRevision": True or False, # Optional. LatestRevision may be provided to indicate that the latest ready Revision of the Configuration should be used for this traffic target. When provided LatestRevision must be true if RevisionName is empty; it must be false when RevisionName is non-empty.
         "percent": 42, # Percent specifies percent of the traffic to this Revision or Configuration. This defaults to zero if unspecified. Cloud Run currently requires 100 percent for a single ConfigurationName TrafficTarget entry.
         "revisionName": "A String", # RevisionName of a specific revision to which to send this portion of traffic. This is mutually exclusive with ConfigurationName. Providing RevisionName in spec is not currently supported by Cloud Run.
-        "tag": "A String", # Tag is optionally used to expose a dedicated url for referencing this target exclusively. +optional
+        "tag": "A String", # Optional. Tag is used to expose a dedicated url for referencing this target exclusively.
         "url": "A String", # Output only. URL displays the URL for accessing tagged traffic targets. URL is displayed in status, and is disallowed on spec. URL must contain a scheme (e.g. http://) and a hostname, but may not contain anything else (e.g. basic auth, url path, etc.)
       },
     ],
@@ -1101,10 +1101,10 @@
     "traffic": [ # From RouteStatus. Traffic holds the configured traffic distribution. These entries will always contain RevisionName references. When ConfigurationName appears in the spec, this will hold the LatestReadyRevisionName that we last observed.
       { # TrafficTarget holds a single entry of the routing table for a Route.
         "configurationName": "A String", # ConfigurationName of a configuration to whose latest revision we will send this portion of traffic. When the "status.latestReadyRevisionName" of the referenced configuration changes, we will automatically migrate traffic from the prior "latest ready" revision to the new one. This field is never set in Route's status, only its spec. This is mutually exclusive with RevisionName. Cloud Run currently supports a single ConfigurationName.
-        "latestRevision": True or False, # LatestRevision may be optionally provided to indicate that the latest ready Revision of the Configuration should be used for this traffic target. When provided LatestRevision must be true if RevisionName is empty; it must be false when RevisionName is non-empty. +optional
+        "latestRevision": True or False, # Optional. LatestRevision may be provided to indicate that the latest ready Revision of the Configuration should be used for this traffic target. When provided LatestRevision must be true if RevisionName is empty; it must be false when RevisionName is non-empty.
         "percent": 42, # Percent specifies percent of the traffic to this Revision or Configuration. This defaults to zero if unspecified. Cloud Run currently requires 100 percent for a single ConfigurationName TrafficTarget entry.
         "revisionName": "A String", # RevisionName of a specific revision to which to send this portion of traffic. This is mutually exclusive with ConfigurationName. Providing RevisionName in spec is not currently supported by Cloud Run.
-        "tag": "A String", # Tag is optionally used to expose a dedicated url for referencing this target exclusively. +optional
+        "tag": "A String", # Optional. Tag is used to expose a dedicated url for referencing this target exclusively.
         "url": "A String", # Output only. URL displays the URL for accessing tagged traffic targets. URL is displayed in status, and is disallowed on spec. URL must contain a scheme (e.g. http://) and a hostname, but may not contain anything else (e.g. basic auth, url path, etc.)
       },
     ],
@@ -1119,11 +1119,11 @@
 
 Args:
   parent: string, The namespace from which the services should be listed. For Cloud Run (fully managed), replace {namespace_id} with the project ID or number. (required)
-  continue: string, Optional encoded string to continue paging.
+  continue: string, Optional. Encoded string to continue paging.
   fieldSelector: string, Allows to filter resources based on a specific value for a field name. Send this in a query string format. i.e. 'metadata.name%3Dlorem'. Not currently used by Cloud Run.
   includeUninitialized: boolean, Not currently used by Cloud Run.
   labelSelector: string, Allows to filter resources based on a label. Supported operations are =, !=, exists, in, and notIn.
-  limit: integer, The maximum number of records that should be returned.
+  limit: integer, Optional. The maximum number of records that should be returned.
   resourceVersion: string, The baseline resource version from which the list or watch operation should start. Not currently used by Cloud Run.
   watch: boolean, Flag that indicates that the client expects to watch this resource as well. Not currently used by Cloud Run.
   x__xgafv: string, V1 error format.
@@ -1207,7 +1207,7 @@
             "uid": "A String", # (Optional) UID is the unique in time and space value for this object. It is typically generated by the server on successful creation of a resource and is not allowed to change on PUT operations. Populated by the system. Read-only. More info: http://kubernetes.io/docs/user-guide/identifiers#uids
           },
           "spec": { # RevisionSpec holds the desired state of the Revision (from the client). # RevisionSpec holds the desired state of the Revision (from the client).
-            "containerConcurrency": 42, # (Optional) ContainerConcurrency specifies the maximum allowed in-flight (concurrent) requests per container instance of the Revision. Cloud Run fully managed: supported, defaults to 80 Cloud Run for Anthos: supported, defaults to 0, which means concurrency to the application is not limited, and the system decides the target concurrency for the autoscaler.
+            "containerConcurrency": 42, # Optional. ContainerConcurrency specifies the maximum allowed in-flight (concurrent) requests per container instance of the Revision. Cloud Run fully managed: supported, defaults to 80 Cloud Run for Anthos: supported, defaults to 0, which means concurrency to the application is not limited, and the system decides the target concurrency for the autoscaler.
             "containers": [ # Containers holds the single container that defines the unit of execution for this Revision. In the context of a Revision, we disallow a number of fields on this Container, including: name and lifecycle. In Cloud Run, only a single container may be provided. The runtime contract is documented here: https://github.com/knative/serving/blob/master/docs/runtime-contract.md
               { # A single application container. This specifies both the container to run, the command to run in the container and the arguments to supply to it. Note that additional arguments may be supplied by the system to the container at runtime.
                 "args": [ # (Optional) Arguments to the entrypoint. The docker image's CMD is used if this is not provided. Variable references $(VAR_NAME) are expanded using the container's environment. If a variable cannot be resolved, the reference in the input string will be unchanged. The $(VAR_NAME) syntax can be escaped with a double $$, ie: $$(VAR_NAME). Escaped references will never be expanded, regardless of whether the variable exists or not. More info: https://kubernetes.io/docs/tasks/inject-data-application/define-command-argument-container/#running-a-command-in-a-shell
@@ -1410,10 +1410,10 @@
         "traffic": [ # Traffic specifies how to distribute traffic over a collection of Knative Revisions and Configurations.
           { # TrafficTarget holds a single entry of the routing table for a Route.
             "configurationName": "A String", # ConfigurationName of a configuration to whose latest revision we will send this portion of traffic. When the "status.latestReadyRevisionName" of the referenced configuration changes, we will automatically migrate traffic from the prior "latest ready" revision to the new one. This field is never set in Route's status, only its spec. This is mutually exclusive with RevisionName. Cloud Run currently supports a single ConfigurationName.
-            "latestRevision": True or False, # LatestRevision may be optionally provided to indicate that the latest ready Revision of the Configuration should be used for this traffic target. When provided LatestRevision must be true if RevisionName is empty; it must be false when RevisionName is non-empty. +optional
+            "latestRevision": True or False, # Optional. LatestRevision may be provided to indicate that the latest ready Revision of the Configuration should be used for this traffic target. When provided LatestRevision must be true if RevisionName is empty; it must be false when RevisionName is non-empty.
             "percent": 42, # Percent specifies percent of the traffic to this Revision or Configuration. This defaults to zero if unspecified. Cloud Run currently requires 100 percent for a single ConfigurationName TrafficTarget entry.
             "revisionName": "A String", # RevisionName of a specific revision to which to send this portion of traffic. This is mutually exclusive with ConfigurationName. Providing RevisionName in spec is not currently supported by Cloud Run.
-            "tag": "A String", # Tag is optionally used to expose a dedicated url for referencing this target exclusively. +optional
+            "tag": "A String", # Optional. Tag is used to expose a dedicated url for referencing this target exclusively.
             "url": "A String", # Output only. URL displays the URL for accessing tagged traffic targets. URL is displayed in status, and is disallowed on spec. URL must contain a scheme (e.g. http://) and a hostname, but may not contain anything else (e.g. basic auth, url path, etc.)
           },
         ],
@@ -1438,10 +1438,10 @@
         "traffic": [ # From RouteStatus. Traffic holds the configured traffic distribution. These entries will always contain RevisionName references. When ConfigurationName appears in the spec, this will hold the LatestReadyRevisionName that we last observed.
           { # TrafficTarget holds a single entry of the routing table for a Route.
             "configurationName": "A String", # ConfigurationName of a configuration to whose latest revision we will send this portion of traffic. When the "status.latestReadyRevisionName" of the referenced configuration changes, we will automatically migrate traffic from the prior "latest ready" revision to the new one. This field is never set in Route's status, only its spec. This is mutually exclusive with RevisionName. Cloud Run currently supports a single ConfigurationName.
-            "latestRevision": True or False, # LatestRevision may be optionally provided to indicate that the latest ready Revision of the Configuration should be used for this traffic target. When provided LatestRevision must be true if RevisionName is empty; it must be false when RevisionName is non-empty. +optional
+            "latestRevision": True or False, # Optional. LatestRevision may be provided to indicate that the latest ready Revision of the Configuration should be used for this traffic target. When provided LatestRevision must be true if RevisionName is empty; it must be false when RevisionName is non-empty.
             "percent": 42, # Percent specifies percent of the traffic to this Revision or Configuration. This defaults to zero if unspecified. Cloud Run currently requires 100 percent for a single ConfigurationName TrafficTarget entry.
             "revisionName": "A String", # RevisionName of a specific revision to which to send this portion of traffic. This is mutually exclusive with ConfigurationName. Providing RevisionName in spec is not currently supported by Cloud Run.
-            "tag": "A String", # Tag is optionally used to expose a dedicated url for referencing this target exclusively. +optional
+            "tag": "A String", # Optional. Tag is used to expose a dedicated url for referencing this target exclusively.
             "url": "A String", # Output only. URL displays the URL for accessing tagged traffic targets. URL is displayed in status, and is disallowed on spec. URL must contain a scheme (e.g. http://) and a hostname, but may not contain anything else (e.g. basic auth, url path, etc.)
           },
         ],
@@ -1540,7 +1540,7 @@
         "uid": "A String", # (Optional) UID is the unique in time and space value for this object. It is typically generated by the server on successful creation of a resource and is not allowed to change on PUT operations. Populated by the system. Read-only. More info: http://kubernetes.io/docs/user-guide/identifiers#uids
       },
       "spec": { # RevisionSpec holds the desired state of the Revision (from the client). # RevisionSpec holds the desired state of the Revision (from the client).
-        "containerConcurrency": 42, # (Optional) ContainerConcurrency specifies the maximum allowed in-flight (concurrent) requests per container instance of the Revision. Cloud Run fully managed: supported, defaults to 80 Cloud Run for Anthos: supported, defaults to 0, which means concurrency to the application is not limited, and the system decides the target concurrency for the autoscaler.
+        "containerConcurrency": 42, # Optional. ContainerConcurrency specifies the maximum allowed in-flight (concurrent) requests per container instance of the Revision. Cloud Run fully managed: supported, defaults to 80 Cloud Run for Anthos: supported, defaults to 0, which means concurrency to the application is not limited, and the system decides the target concurrency for the autoscaler.
         "containers": [ # Containers holds the single container that defines the unit of execution for this Revision. In the context of a Revision, we disallow a number of fields on this Container, including: name and lifecycle. In Cloud Run, only a single container may be provided. The runtime contract is documented here: https://github.com/knative/serving/blob/master/docs/runtime-contract.md
           { # A single application container. This specifies both the container to run, the command to run in the container and the arguments to supply to it. Note that additional arguments may be supplied by the system to the container at runtime.
             "args": [ # (Optional) Arguments to the entrypoint. The docker image's CMD is used if this is not provided. Variable references $(VAR_NAME) are expanded using the container's environment. If a variable cannot be resolved, the reference in the input string will be unchanged. The $(VAR_NAME) syntax can be escaped with a double $$, ie: $$(VAR_NAME). Escaped references will never be expanded, regardless of whether the variable exists or not. More info: https://kubernetes.io/docs/tasks/inject-data-application/define-command-argument-container/#running-a-command-in-a-shell
@@ -1743,10 +1743,10 @@
     "traffic": [ # Traffic specifies how to distribute traffic over a collection of Knative Revisions and Configurations.
       { # TrafficTarget holds a single entry of the routing table for a Route.
         "configurationName": "A String", # ConfigurationName of a configuration to whose latest revision we will send this portion of traffic. When the "status.latestReadyRevisionName" of the referenced configuration changes, we will automatically migrate traffic from the prior "latest ready" revision to the new one. This field is never set in Route's status, only its spec. This is mutually exclusive with RevisionName. Cloud Run currently supports a single ConfigurationName.
-        "latestRevision": True or False, # LatestRevision may be optionally provided to indicate that the latest ready Revision of the Configuration should be used for this traffic target. When provided LatestRevision must be true if RevisionName is empty; it must be false when RevisionName is non-empty. +optional
+        "latestRevision": True or False, # Optional. LatestRevision may be provided to indicate that the latest ready Revision of the Configuration should be used for this traffic target. When provided LatestRevision must be true if RevisionName is empty; it must be false when RevisionName is non-empty.
         "percent": 42, # Percent specifies percent of the traffic to this Revision or Configuration. This defaults to zero if unspecified. Cloud Run currently requires 100 percent for a single ConfigurationName TrafficTarget entry.
         "revisionName": "A String", # RevisionName of a specific revision to which to send this portion of traffic. This is mutually exclusive with ConfigurationName. Providing RevisionName in spec is not currently supported by Cloud Run.
-        "tag": "A String", # Tag is optionally used to expose a dedicated url for referencing this target exclusively. +optional
+        "tag": "A String", # Optional. Tag is used to expose a dedicated url for referencing this target exclusively.
         "url": "A String", # Output only. URL displays the URL for accessing tagged traffic targets. URL is displayed in status, and is disallowed on spec. URL must contain a scheme (e.g. http://) and a hostname, but may not contain anything else (e.g. basic auth, url path, etc.)
       },
     ],
@@ -1771,10 +1771,10 @@
     "traffic": [ # From RouteStatus. Traffic holds the configured traffic distribution. These entries will always contain RevisionName references. When ConfigurationName appears in the spec, this will hold the LatestReadyRevisionName that we last observed.
       { # TrafficTarget holds a single entry of the routing table for a Route.
         "configurationName": "A String", # ConfigurationName of a configuration to whose latest revision we will send this portion of traffic. When the "status.latestReadyRevisionName" of the referenced configuration changes, we will automatically migrate traffic from the prior "latest ready" revision to the new one. This field is never set in Route's status, only its spec. This is mutually exclusive with RevisionName. Cloud Run currently supports a single ConfigurationName.
-        "latestRevision": True or False, # LatestRevision may be optionally provided to indicate that the latest ready Revision of the Configuration should be used for this traffic target. When provided LatestRevision must be true if RevisionName is empty; it must be false when RevisionName is non-empty. +optional
+        "latestRevision": True or False, # Optional. LatestRevision may be provided to indicate that the latest ready Revision of the Configuration should be used for this traffic target. When provided LatestRevision must be true if RevisionName is empty; it must be false when RevisionName is non-empty.
         "percent": 42, # Percent specifies percent of the traffic to this Revision or Configuration. This defaults to zero if unspecified. Cloud Run currently requires 100 percent for a single ConfigurationName TrafficTarget entry.
         "revisionName": "A String", # RevisionName of a specific revision to which to send this portion of traffic. This is mutually exclusive with ConfigurationName. Providing RevisionName in spec is not currently supported by Cloud Run.
-        "tag": "A String", # Tag is optionally used to expose a dedicated url for referencing this target exclusively. +optional
+        "tag": "A String", # Optional. Tag is used to expose a dedicated url for referencing this target exclusively.
         "url": "A String", # Output only. URL displays the URL for accessing tagged traffic targets. URL is displayed in status, and is disallowed on spec. URL must contain a scheme (e.g. http://) and a hostname, but may not contain anything else (e.g. basic auth, url path, etc.)
       },
     ],
@@ -1861,7 +1861,7 @@
         "uid": "A String", # (Optional) UID is the unique in time and space value for this object. It is typically generated by the server on successful creation of a resource and is not allowed to change on PUT operations. Populated by the system. Read-only. More info: http://kubernetes.io/docs/user-guide/identifiers#uids
       },
       "spec": { # RevisionSpec holds the desired state of the Revision (from the client). # RevisionSpec holds the desired state of the Revision (from the client).
-        "containerConcurrency": 42, # (Optional) ContainerConcurrency specifies the maximum allowed in-flight (concurrent) requests per container instance of the Revision. Cloud Run fully managed: supported, defaults to 80 Cloud Run for Anthos: supported, defaults to 0, which means concurrency to the application is not limited, and the system decides the target concurrency for the autoscaler.
+        "containerConcurrency": 42, # Optional. ContainerConcurrency specifies the maximum allowed in-flight (concurrent) requests per container instance of the Revision. Cloud Run fully managed: supported, defaults to 80 Cloud Run for Anthos: supported, defaults to 0, which means concurrency to the application is not limited, and the system decides the target concurrency for the autoscaler.
         "containers": [ # Containers holds the single container that defines the unit of execution for this Revision. In the context of a Revision, we disallow a number of fields on this Container, including: name and lifecycle. In Cloud Run, only a single container may be provided. The runtime contract is documented here: https://github.com/knative/serving/blob/master/docs/runtime-contract.md
           { # A single application container. This specifies both the container to run, the command to run in the container and the arguments to supply to it. Note that additional arguments may be supplied by the system to the container at runtime.
             "args": [ # (Optional) Arguments to the entrypoint. The docker image's CMD is used if this is not provided. Variable references $(VAR_NAME) are expanded using the container's environment. If a variable cannot be resolved, the reference in the input string will be unchanged. The $(VAR_NAME) syntax can be escaped with a double $$, ie: $$(VAR_NAME). Escaped references will never be expanded, regardless of whether the variable exists or not. More info: https://kubernetes.io/docs/tasks/inject-data-application/define-command-argument-container/#running-a-command-in-a-shell
@@ -2064,10 +2064,10 @@
     "traffic": [ # Traffic specifies how to distribute traffic over a collection of Knative Revisions and Configurations.
       { # TrafficTarget holds a single entry of the routing table for a Route.
         "configurationName": "A String", # ConfigurationName of a configuration to whose latest revision we will send this portion of traffic. When the "status.latestReadyRevisionName" of the referenced configuration changes, we will automatically migrate traffic from the prior "latest ready" revision to the new one. This field is never set in Route's status, only its spec. This is mutually exclusive with RevisionName. Cloud Run currently supports a single ConfigurationName.
-        "latestRevision": True or False, # LatestRevision may be optionally provided to indicate that the latest ready Revision of the Configuration should be used for this traffic target. When provided LatestRevision must be true if RevisionName is empty; it must be false when RevisionName is non-empty. +optional
+        "latestRevision": True or False, # Optional. LatestRevision may be provided to indicate that the latest ready Revision of the Configuration should be used for this traffic target. When provided LatestRevision must be true if RevisionName is empty; it must be false when RevisionName is non-empty.
         "percent": 42, # Percent specifies percent of the traffic to this Revision or Configuration. This defaults to zero if unspecified. Cloud Run currently requires 100 percent for a single ConfigurationName TrafficTarget entry.
         "revisionName": "A String", # RevisionName of a specific revision to which to send this portion of traffic. This is mutually exclusive with ConfigurationName. Providing RevisionName in spec is not currently supported by Cloud Run.
-        "tag": "A String", # Tag is optionally used to expose a dedicated url for referencing this target exclusively. +optional
+        "tag": "A String", # Optional. Tag is used to expose a dedicated url for referencing this target exclusively.
         "url": "A String", # Output only. URL displays the URL for accessing tagged traffic targets. URL is displayed in status, and is disallowed on spec. URL must contain a scheme (e.g. http://) and a hostname, but may not contain anything else (e.g. basic auth, url path, etc.)
       },
     ],
@@ -2092,10 +2092,10 @@
     "traffic": [ # From RouteStatus. Traffic holds the configured traffic distribution. These entries will always contain RevisionName references. When ConfigurationName appears in the spec, this will hold the LatestReadyRevisionName that we last observed.
       { # TrafficTarget holds a single entry of the routing table for a Route.
         "configurationName": "A String", # ConfigurationName of a configuration to whose latest revision we will send this portion of traffic. When the "status.latestReadyRevisionName" of the referenced configuration changes, we will automatically migrate traffic from the prior "latest ready" revision to the new one. This field is never set in Route's status, only its spec. This is mutually exclusive with RevisionName. Cloud Run currently supports a single ConfigurationName.
-        "latestRevision": True or False, # LatestRevision may be optionally provided to indicate that the latest ready Revision of the Configuration should be used for this traffic target. When provided LatestRevision must be true if RevisionName is empty; it must be false when RevisionName is non-empty. +optional
+        "latestRevision": True or False, # Optional. LatestRevision may be provided to indicate that the latest ready Revision of the Configuration should be used for this traffic target. When provided LatestRevision must be true if RevisionName is empty; it must be false when RevisionName is non-empty.
         "percent": 42, # Percent specifies percent of the traffic to this Revision or Configuration. This defaults to zero if unspecified. Cloud Run currently requires 100 percent for a single ConfigurationName TrafficTarget entry.
         "revisionName": "A String", # RevisionName of a specific revision to which to send this portion of traffic. This is mutually exclusive with ConfigurationName. Providing RevisionName in spec is not currently supported by Cloud Run.
-        "tag": "A String", # Tag is optionally used to expose a dedicated url for referencing this target exclusively. +optional
+        "tag": "A String", # Optional. Tag is used to expose a dedicated url for referencing this target exclusively.
         "url": "A String", # Output only. URL displays the URL for accessing tagged traffic targets. URL is displayed in status, and is disallowed on spec. URL must contain a scheme (e.g. http://) and a hostname, but may not contain anything else (e.g. basic auth, url path, etc.)
       },
     ],