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/sqladmin_v1beta4.backupRuns.html b/docs/dyn/sqladmin_v1beta4.backupRuns.html
index 8868eab..5a38d32 100644
--- a/docs/dyn/sqladmin_v1beta4.backupRuns.html
+++ b/docs/dyn/sqladmin_v1beta4.backupRuns.html
@@ -85,7 +85,7 @@
 <p class="firstline">Retrieves a resource containing information about a backup run.</p>
 <p class="toc_element">
   <code><a href="#insert">insert(project, instance, body=None, x__xgafv=None)</a></code></p>
-<p class="firstline">Creates a new backup run on demand. This method is applicable only to Second Generation instances.</p>
+<p class="firstline">Creates a new backup run on demand.</p>
 <p class="toc_element">
   <code><a href="#list">list(project, instance, maxResults=None, pageToken=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Lists all backup runs associated with the project or a given instance and configuration in the reverse chronological order of the backup initiation time.</p>
@@ -105,7 +105,7 @@
 Args:
   project: string, Project ID of the project that contains the instance. (required)
   instance: string, Cloud SQL instance ID. This does not include the project ID. (required)
-  id: string, The ID of the Backup Run to delete. To find a Backup Run ID, use the list method. (required)
+  id: string, The ID of the backup run to delete. To find a backup run ID, use the list method. (required)
   x__xgafv: string, V1 error format.
     Allowed values
       1 - v1 error format
@@ -192,7 +192,7 @@
 Args:
   project: string, Project ID of the project that contains the instance. (required)
   instance: string, Cloud SQL instance ID. This does not include the project ID. (required)
-  id: string, The ID of this Backup Run. (required)
+  id: string, The ID of this backup run. (required)
   x__xgafv: string, V1 error format.
     Allowed values
       1 - v1 error format
@@ -204,11 +204,11 @@
     { # A BackupRun resource.
   &quot;backupKind&quot;: &quot;A String&quot;, # Specifies the kind of backup, PHYSICAL or DEFAULT_SNAPSHOT.
   &quot;description&quot;: &quot;A String&quot;, # The description of this run, only applicable to on-demand backups.
-  &quot;diskEncryptionConfiguration&quot;: { # Disk encryption configuration for an instance. # Encryption configuration specific to a backup. Applies only to Second Generation instances.
+  &quot;diskEncryptionConfiguration&quot;: { # Disk encryption configuration for an instance. # Encryption configuration specific to a backup.
     &quot;kind&quot;: &quot;A String&quot;, # This is always *sql#diskEncryptionConfiguration*.
     &quot;kmsKeyName&quot;: &quot;A String&quot;, # Resource name of KMS key for disk encryption
   },
-  &quot;diskEncryptionStatus&quot;: { # Disk encryption status for an instance. # Encryption status specific to a backup. Applies only to Second Generation instances.
+  &quot;diskEncryptionStatus&quot;: { # Disk encryption status for an instance. # Encryption status specific to a backup.
     &quot;kind&quot;: &quot;A String&quot;, # This is always *sql#diskEncryptionStatus*.
     &quot;kmsKeyVersionName&quot;: &quot;A String&quot;, # KMS key version used to encrypt the Cloud SQL instance resource
   },
@@ -233,7 +233,7 @@
 
 <div class="method">
     <code class="details" id="insert">insert(project, instance, body=None, x__xgafv=None)</code>
-  <pre>Creates a new backup run on demand. This method is applicable only to Second Generation instances.
+  <pre>Creates a new backup run on demand.
 
 Args:
   project: string, Project ID of the project that contains the instance. (required)
@@ -244,11 +244,11 @@
 { # A BackupRun resource.
   &quot;backupKind&quot;: &quot;A String&quot;, # Specifies the kind of backup, PHYSICAL or DEFAULT_SNAPSHOT.
   &quot;description&quot;: &quot;A String&quot;, # The description of this run, only applicable to on-demand backups.
-  &quot;diskEncryptionConfiguration&quot;: { # Disk encryption configuration for an instance. # Encryption configuration specific to a backup. Applies only to Second Generation instances.
+  &quot;diskEncryptionConfiguration&quot;: { # Disk encryption configuration for an instance. # Encryption configuration specific to a backup.
     &quot;kind&quot;: &quot;A String&quot;, # This is always *sql#diskEncryptionConfiguration*.
     &quot;kmsKeyName&quot;: &quot;A String&quot;, # Resource name of KMS key for disk encryption
   },
-  &quot;diskEncryptionStatus&quot;: { # Disk encryption status for an instance. # Encryption status specific to a backup. Applies only to Second Generation instances.
+  &quot;diskEncryptionStatus&quot;: { # Disk encryption status for an instance. # Encryption status specific to a backup.
     &quot;kind&quot;: &quot;A String&quot;, # This is always *sql#diskEncryptionStatus*.
     &quot;kmsKeyVersionName&quot;: &quot;A String&quot;, # KMS key version used to encrypt the Cloud SQL instance resource
   },
@@ -371,11 +371,11 @@
     { # A BackupRun resource.
       &quot;backupKind&quot;: &quot;A String&quot;, # Specifies the kind of backup, PHYSICAL or DEFAULT_SNAPSHOT.
       &quot;description&quot;: &quot;A String&quot;, # The description of this run, only applicable to on-demand backups.
-      &quot;diskEncryptionConfiguration&quot;: { # Disk encryption configuration for an instance. # Encryption configuration specific to a backup. Applies only to Second Generation instances.
+      &quot;diskEncryptionConfiguration&quot;: { # Disk encryption configuration for an instance. # Encryption configuration specific to a backup.
         &quot;kind&quot;: &quot;A String&quot;, # This is always *sql#diskEncryptionConfiguration*.
         &quot;kmsKeyName&quot;: &quot;A String&quot;, # Resource name of KMS key for disk encryption
       },
-      &quot;diskEncryptionStatus&quot;: { # Disk encryption status for an instance. # Encryption status specific to a backup. Applies only to Second Generation instances.
+      &quot;diskEncryptionStatus&quot;: { # Disk encryption status for an instance. # Encryption status specific to a backup.
         &quot;kind&quot;: &quot;A String&quot;, # This is always *sql#diskEncryptionStatus*.
         &quot;kmsKeyVersionName&quot;: &quot;A String&quot;, # KMS key version used to encrypt the Cloud SQL instance resource
       },