chore: Update discovery artifacts (#1325)

## Deleted keys were detected in the following stable discovery artifacts:
apigeev1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/9106808da3e03faa4c27913358e0c07edd82ff5a)

## Discovery Artifact Change Summary:
apigeev1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/9106808da3e03faa4c27913358e0c07edd82ff5a)
dataflowv1b3[ [More details]](https://github.com/googleapis/google-api-python-client/commit/9dd646184e70a83831f3347fc01a3eb0090ca0e8)
dialogflowv2[ [More details]](https://github.com/googleapis/google-api-python-client/commit/a7f2e96e6b283771e986d9ec7f1f057ff67e2a29)
dialogflowv2beta1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/a7f2e96e6b283771e986d9ec7f1f057ff67e2a29)
dialogflowv3[ [More details]](https://github.com/googleapis/google-api-python-client/commit/a7f2e96e6b283771e986d9ec7f1f057ff67e2a29)
documentaiv1beta3[ [More details]](https://github.com/googleapis/google-api-python-client/commit/ee1318d36230ff4b7393ce1f15d6a9ee71d23cea)
healthcarev1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/1204c1d486e08630773812ff1cc35843d98eb1d8)

feat(apigee): update the api
feat(dataflow): update the api
feat(dialogflow): update the api
feat(documentai): update the api
feat(healthcare): update the api

diff --git a/docs/dyn/bigtableadmin_v2.projects.instances.tables.html b/docs/dyn/bigtableadmin_v2.projects.instances.tables.html
index eb8aaf2..170fa95 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