chore: Update discovery artifacts (#1472)

## Deleted keys were detected in the following stable discovery artifacts:
monitoring v1 https://github.com/googleapis/google-api-python-client/commit/75a5ced2b372723c21d45b172dd69e0bb91c5509

## Deleted keys were detected in the following pre-stable discovery artifacts:
ideahub v1alpha https://github.com/googleapis/google-api-python-client/commit/24483a4f512922f809fc8352b9407e606856b0e2
speech v1p1beta1 https://github.com/googleapis/google-api-python-client/commit/689fff21696add03b8c3ab843374b6bd2dd3cc16

## Discovery Artifact Change Summary:
feat(androidpublisher): update the api https://github.com/googleapis/google-api-python-client/commit/cf67afc22e94f856773895a4e603e7a9a6bfa20b
feat(apigee): update the api https://github.com/googleapis/google-api-python-client/commit/995336984e11fb9f91308d14a68faf8f3091d1fa
feat(appengine): update the api https://github.com/googleapis/google-api-python-client/commit/eb7a571470cef08641224558a7bd8eaa07a41bad
feat(chromepolicy): update the api https://github.com/googleapis/google-api-python-client/commit/5654776fdc8361aa0703a7dca8069b576a1b2f73
feat(cloudbuild): update the api https://github.com/googleapis/google-api-python-client/commit/437e37f1c36268464f90e075ffeaef61580de237
feat(cloudkms): update the api https://github.com/googleapis/google-api-python-client/commit/ebd3f49f78738792032e431b73233ae0c458bae3
feat(containeranalysis): update the api https://github.com/googleapis/google-api-python-client/commit/d446928f941d858022f0e1a1911bbf185920159d
feat(dialogflow): update the api https://github.com/googleapis/google-api-python-client/commit/0feb05616eb28db7c35e128ebbf338b63446b8cf
fix(fcm): update the api https://github.com/googleapis/google-api-python-client/commit/f1dd412cad2a2cdd1863bb2942cf07fc6a42b649
feat(ideahub): update the api https://github.com/googleapis/google-api-python-client/commit/24483a4f512922f809fc8352b9407e606856b0e2
feat(metastore): update the api https://github.com/googleapis/google-api-python-client/commit/897beb3754da50e117292f5954265076804acb7f
feat(monitoring): update the api https://github.com/googleapis/google-api-python-client/commit/75a5ced2b372723c21d45b172dd69e0bb91c5509
feat(osconfig): update the api https://github.com/googleapis/google-api-python-client/commit/c8b511a21f7fc7f2471d5f7a3b2d3760e4f8a629
feat(speech): update the api https://github.com/googleapis/google-api-python-client/commit/689fff21696add03b8c3ab843374b6bd2dd3cc16
feat(storagetransfer): update the api https://github.com/googleapis/google-api-python-client/commit/24564836842f792e9373ea505d97e775f64a5960
diff --git a/docs/dyn/spanner_v1.projects.instances.html b/docs/dyn/spanner_v1.projects.instances.html
index 875fa51..2a86dc9 100644
--- a/docs/dyn/spanner_v1.projects.instances.html
+++ b/docs/dyn/spanner_v1.projects.instances.html
@@ -155,8 +155,8 @@
       "a_key": "A String",
     },
     "name": "A String", # Required. A unique identifier for the instance, which cannot be changed after the instance is created. Values are of the form `projects//instances/a-z*[a-z0-9]`. The final segment of the name must be between 2 and 64 characters in length.
-    "nodeCount": 42, # The number of nodes allocated to this instance. This may be zero in API responses for instances that are not yet in state `READY`. See [the documentation](https://cloud.google.com/spanner/docs/instances#node_count) for more information about nodes.
-    "processingUnits": 42, # The number of processing units allocated to this instance. At most one of processing_units or node_count should be present in the message. This may be zero in API responses for instances that are not yet in state `READY`.
+    "nodeCount": 42, # The number of nodes allocated to this instance. At most one of either node_count or processing_units should be present in the message. This may be zero in API responses for instances that are not yet in state `READY`. See [the documentation](https://cloud.google.com/spanner/docs/compute-capacity) for more information about nodes and processing units.
+    "processingUnits": 42, # The number of processing units allocated to this instance. At most one of processing_units or node_count should be present in the message. This may be zero in API responses for instances that are not yet in state `READY`. See [the documentation](https://cloud.google.com/spanner/docs/compute-capacity) for more information about nodes and processing units.
     "state": "A String", # Output only. The current instance state. For CreateInstance, the state must be either omitted or set to `CREATING`. For UpdateInstance, the state must be either omitted or set to `READY`.
   },
   "instanceId": "A String", # Required. The ID of the instance to create. Valid identifiers are of the form `a-z*[a-z0-9]` and must be between 2 and 64 characters in length.
@@ -234,8 +234,8 @@
     "a_key": "A String",
   },
   "name": "A String", # Required. A unique identifier for the instance, which cannot be changed after the instance is created. Values are of the form `projects//instances/a-z*[a-z0-9]`. The final segment of the name must be between 2 and 64 characters in length.
-  "nodeCount": 42, # The number of nodes allocated to this instance. This may be zero in API responses for instances that are not yet in state `READY`. See [the documentation](https://cloud.google.com/spanner/docs/instances#node_count) for more information about nodes.
-  "processingUnits": 42, # The number of processing units allocated to this instance. At most one of processing_units or node_count should be present in the message. This may be zero in API responses for instances that are not yet in state `READY`.
+  "nodeCount": 42, # The number of nodes allocated to this instance. At most one of either node_count or processing_units should be present in the message. This may be zero in API responses for instances that are not yet in state `READY`. See [the documentation](https://cloud.google.com/spanner/docs/compute-capacity) for more information about nodes and processing units.
+  "processingUnits": 42, # The number of processing units allocated to this instance. At most one of processing_units or node_count should be present in the message. This may be zero in API responses for instances that are not yet in state `READY`. See [the documentation](https://cloud.google.com/spanner/docs/compute-capacity) for more information about nodes and processing units.
   "state": "A String", # Output only. The current instance state. For CreateInstance, the state must be either omitted or set to `CREATING`. For UpdateInstance, the state must be either omitted or set to `READY`.
 }</pre>
 </div>
@@ -313,8 +313,8 @@
         &quot;a_key&quot;: &quot;A String&quot;,
       },
       &quot;name&quot;: &quot;A String&quot;, # Required. A unique identifier for the instance, which cannot be changed after the instance is created. Values are of the form `projects//instances/a-z*[a-z0-9]`. The final segment of the name must be between 2 and 64 characters in length.
-      &quot;nodeCount&quot;: 42, # The number of nodes allocated to this instance. This may be zero in API responses for instances that are not yet in state `READY`. See [the documentation](https://cloud.google.com/spanner/docs/instances#node_count) for more information about nodes.
-      &quot;processingUnits&quot;: 42, # The number of processing units allocated to this instance. At most one of processing_units or node_count should be present in the message. This may be zero in API responses for instances that are not yet in state `READY`.
+      &quot;nodeCount&quot;: 42, # The number of nodes allocated to this instance. At most one of either node_count or processing_units should be present in the message. This may be zero in API responses for instances that are not yet in state `READY`. See [the documentation](https://cloud.google.com/spanner/docs/compute-capacity) for more information about nodes and processing units.
+      &quot;processingUnits&quot;: 42, # The number of processing units allocated to this instance. At most one of processing_units or node_count should be present in the message. This may be zero in API responses for instances that are not yet in state `READY`. See [the documentation](https://cloud.google.com/spanner/docs/compute-capacity) for more information about nodes and processing units.
       &quot;state&quot;: &quot;A String&quot;, # Output only. The current instance state. For CreateInstance, the state must be either omitted or set to `CREATING`. For UpdateInstance, the state must be either omitted or set to `READY`.
     },
   ],
@@ -360,8 +360,8 @@
       &quot;a_key&quot;: &quot;A String&quot;,
     },
     &quot;name&quot;: &quot;A String&quot;, # Required. A unique identifier for the instance, which cannot be changed after the instance is created. Values are of the form `projects//instances/a-z*[a-z0-9]`. The final segment of the name must be between 2 and 64 characters in length.
-    &quot;nodeCount&quot;: 42, # The number of nodes allocated to this instance. This may be zero in API responses for instances that are not yet in state `READY`. See [the documentation](https://cloud.google.com/spanner/docs/instances#node_count) for more information about nodes.
-    &quot;processingUnits&quot;: 42, # The number of processing units allocated to this instance. At most one of processing_units or node_count should be present in the message. This may be zero in API responses for instances that are not yet in state `READY`.
+    &quot;nodeCount&quot;: 42, # The number of nodes allocated to this instance. At most one of either node_count or processing_units should be present in the message. This may be zero in API responses for instances that are not yet in state `READY`. See [the documentation](https://cloud.google.com/spanner/docs/compute-capacity) for more information about nodes and processing units.
+    &quot;processingUnits&quot;: 42, # The number of processing units allocated to this instance. At most one of processing_units or node_count should be present in the message. This may be zero in API responses for instances that are not yet in state `READY`. See [the documentation](https://cloud.google.com/spanner/docs/compute-capacity) for more information about nodes and processing units.
     &quot;state&quot;: &quot;A String&quot;, # Output only. The current instance state. For CreateInstance, the state must be either omitted or set to `CREATING`. For UpdateInstance, the state must be either omitted or set to `READY`.
   },
 }