chore: Update discovery artifacts (#1310)

## Deleted keys were detected in the following pre-stable discovery artifacts:
alertcenterv1beta1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/575006802e6b74ea6b64b5e43c7525cb9d528d38)

## Discovery Artifact Change Summary:
alertcenterv1beta1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/575006802e6b74ea6b64b5e43c7525cb9d528d38)
diff --git a/docs/dyn/bigtableadmin_v2.projects.instances.tables.html b/docs/dyn/bigtableadmin_v2.projects.instances.tables.html
index 170fa95..eb8aaf2 100644
--- a/docs/dyn/bigtableadmin_v2.projects.instances.tables.html
+++ b/docs/dyn/bigtableadmin_v2.projects.instances.tables.html
@@ -359,7 +359,7 @@
       NAME_ONLY - Only populates `name`.
       SCHEMA_VIEW - Only populates `name` and fields related to the table's schema.
       REPLICATION_VIEW - Only populates `name` and fields related to the table's replication state.
-      ENCRYPTION_VIEW - Only populates 'name' and fields related to the table's encryption state.
+      ENCRYPTION_VIEW - Only populates `name` and fields related to the table's encryption state.
       FULL - Populates all fields.
   x__xgafv: string, V1 error format.
     Allowed values
@@ -492,7 +492,7 @@
       NAME_ONLY - Only populates `name`.
       SCHEMA_VIEW - Only populates `name` and fields related to the table's schema.
       REPLICATION_VIEW - Only populates `name` and fields related to the table's replication state.
-      ENCRYPTION_VIEW - Only populates 'name' and fields related to the table's encryption state.
+      ENCRYPTION_VIEW - Only populates `name` and fields related to the table's encryption state.
       FULL - Populates all fields.
   x__xgafv: string, V1 error format.
     Allowed values