chore: Update discovery artifacts (#1356)

## Deleted keys were detected in the following stable discovery artifacts:
compute v1 https://github.com/googleapis/google-api-python-client/commit/685c19d4b5262d27a2b1016e01186188afe610fd
genomics v1 https://github.com/googleapis/google-api-python-client/commit/d0e6cc48df2d0a00d91ce6fbab83aa82146f3573

## Deleted keys were detected in the following pre-stable discovery artifacts:
compute alpha https://github.com/googleapis/google-api-python-client/commit/685c19d4b5262d27a2b1016e01186188afe610fd
compute beta https://github.com/googleapis/google-api-python-client/commit/685c19d4b5262d27a2b1016e01186188afe610fd
genomics v2alpha1 https://github.com/googleapis/google-api-python-client/commit/d0e6cc48df2d0a00d91ce6fbab83aa82146f3573

## Discovery Artifact Change Summary:
feat(analyticsadmin): update the api https://github.com/googleapis/google-api-python-client/commit/9648bae09873a132e7b4627096c153043911be6e
feat(artifactregistry): update the api https://github.com/googleapis/google-api-python-client/commit/7dd722fe8b0ae822f4847219c442aa67a1aae7fd
feat(assuredworkloads): update the api https://github.com/googleapis/google-api-python-client/commit/9b84ffce415133e860cc55bfbd3b9c15c3d46a24
feat(cloudasset): update the api https://github.com/googleapis/google-api-python-client/commit/a8228db5ef31724493f0f62bf8062aca9adc44aa
feat(cloudbuild): update the api https://github.com/googleapis/google-api-python-client/commit/c9d8208c0f9579d958224566af369b809e13016a
feat(compute): update the api https://github.com/googleapis/google-api-python-client/commit/685c19d4b5262d27a2b1016e01186188afe610fd
feat(container): update the api https://github.com/googleapis/google-api-python-client/commit/c5cd244f996b1dfb605ef28eb22f8b0e76bffa1b
feat(dialogflow): update the api https://github.com/googleapis/google-api-python-client/commit/0c6b31fd2deb75ca1c023fed36903b638f5e74f8
feat(documentai): update the api https://github.com/googleapis/google-api-python-client/commit/6dcec9fd8c0f803d37b4c8355870208e5a8c61ce
feat(drive): update the api https://github.com/googleapis/google-api-python-client/commit/8788823461610f31eebd655915e07def9690da48
feat(genomics): update the api https://github.com/googleapis/google-api-python-client/commit/d0e6cc48df2d0a00d91ce6fbab83aa82146f3573
feat(logging): update the api https://github.com/googleapis/google-api-python-client/commit/7f5fa161fd3db9ca6f2df23f5c8bd41ba01e9b9c
feat(privateca): update the api https://github.com/googleapis/google-api-python-client/commit/0a5c31d74f788444640c174c413b12d494a00f1a
feat(pubsublite): update the api https://github.com/googleapis/google-api-python-client/commit/dd67e9b117fdc8d0d0ecff6ade657003a95c12f7
feat(recommender): update the api https://github.com/googleapis/google-api-python-client/commit/4b261d97bea2a8bc042a274c2d904be09da2d82c
diff --git a/googleapiclient/discovery_cache/documents/gkehub.v1beta1.json b/googleapiclient/discovery_cache/documents/gkehub.v1beta1.json
index dff8f52..78989af 100644
--- a/googleapiclient/discovery_cache/documents/gkehub.v1beta1.json
+++ b/googleapiclient/discovery_cache/documents/gkehub.v1beta1.json
@@ -180,7 +180,7 @@
             "memberships": {
               "methods": {
                 "create": {
-                  "description": "Adds a new Membership.",
+                  "description": "Creates a new Membership. **This is currently only supported for GKE clusters on Google Cloud**. To register other clusters, follow the instructions at https://cloud.google.com/anthos/multicluster-management/connect/registering-a-cluster.",
                   "flatPath": "v1beta1/projects/{projectsId}/locations/{locationsId}/memberships",
                   "httpMethod": "POST",
                   "id": "gkehub.projects.locations.memberships.create",
@@ -218,7 +218,7 @@
                   ]
                 },
                 "delete": {
-                  "description": "Removes a Membership.",
+                  "description": "Removes a Membership. **This is currently only supported for GKE clusters on Google Cloud**. To unregister other clusters, follow the instructions at https://cloud.google.com/anthos/multicluster-management/connect/unregistering-a-cluster.",
                   "flatPath": "v1beta1/projects/{projectsId}/locations/{locationsId}/memberships/{membershipsId}",
                   "httpMethod": "DELETE",
                   "id": "gkehub.projects.locations.memberships.delete",
@@ -248,7 +248,7 @@
                   ]
                 },
                 "generateConnectManifest": {
-                  "description": "Generates the manifest for deployment of the GKE connect agent.",
+                  "description": "Generates the manifest for deployment of the GKE connect agent. **This method is used internally by Google-provided libraries.** Most clients should not need to call this method directly.",
                   "flatPath": "v1beta1/projects/{projectsId}/locations/{locationsId}/memberships/{membershipsId}:generateConnectManifest",
                   "httpMethod": "GET",
                   "id": "gkehub.projects.locations.memberships.generateConnectManifest",
@@ -706,7 +706,7 @@
       }
     }
   },
-  "revision": "20210430",
+  "revision": "20210507",
   "rootUrl": "https://gkehub.googleapis.com/",
   "schemas": {
     "AuditConfig": {