chore: Update discovery artifacts (#1477)

## Deleted keys were detected in the following stable discovery artifacts:
apigee v1 https://github.com/googleapis/google-api-python-client/commit/4485c5f3b32c9bda4f50a2a96c5870414f7d870f
sqladmin v1 https://github.com/googleapis/google-api-python-client/commit/41d51e34759b181692ed96d9d490a9cfc5a28459

## Deleted keys were detected in the following pre-stable discovery artifacts:
sqladmin v1beta4 https://github.com/googleapis/google-api-python-client/commit/41d51e34759b181692ed96d9d490a9cfc5a28459
transcoder v1beta1 https://github.com/googleapis/google-api-python-client/commit/1e0b0854e31f52013a8c5423efbd5e34c953e08c

## Discovery Artifact Change Summary:
feat(accesscontextmanager): update the api https://github.com/googleapis/google-api-python-client/commit/30216a669249442cac8f0fb8bb347b1352d8f087
feat(alertcenter): update the api https://github.com/googleapis/google-api-python-client/commit/39b084706537111e8403be6e69f0fc9d82b2f383
feat(apigee): update the api https://github.com/googleapis/google-api-python-client/commit/4485c5f3b32c9bda4f50a2a96c5870414f7d870f
feat(bigquery): update the api https://github.com/googleapis/google-api-python-client/commit/304bbde2360066caf55575e3be5a04fdc8bf8b09
feat(chromemanagement): update the api https://github.com/googleapis/google-api-python-client/commit/0ba28b47236a81a996a3607567b61ab38150617d
feat(cloudasset): update the api https://github.com/googleapis/google-api-python-client/commit/792aa5593ea64ceb4b565e950e153e396274b3b8
feat(cloudbuild): update the api https://github.com/googleapis/google-api-python-client/commit/6b06387ca29e76d26f257c7a4eb6864fe27e082e
feat(cloudchannel): update the api https://github.com/googleapis/google-api-python-client/commit/0b0444ea192f79c5564745be8b1d52b52a74d1fb
feat(cloudkms): update the api https://github.com/googleapis/google-api-python-client/commit/7dc278459cbd32bf15b39633327743cfa0beeea3
feat(composer): update the api https://github.com/googleapis/google-api-python-client/commit/92131bff38ab7644e549f3d71f9c0a84755455db
feat(container): update the api https://github.com/googleapis/google-api-python-client/commit/53d8b4b3e3c5d16ffd14ba1af1cf1769d9249067
feat(containeranalysis): update the api https://github.com/googleapis/google-api-python-client/commit/9ab94f3f4c2ccafdf8b298dad8c6a5c2aa61a606
feat(dialogflow): update the api https://github.com/googleapis/google-api-python-client/commit/b49bfdaedbed3378b061e85f937a36e97732fcd4
feat(iam): update the api https://github.com/googleapis/google-api-python-client/commit/0832247d126965b472a271167028499f015de1ae
feat(metastore): update the api https://github.com/googleapis/google-api-python-client/commit/dd83236343d603e964613b16e9afa25eff60f97c
feat(ondemandscanning): update the api https://github.com/googleapis/google-api-python-client/commit/6ffbe182425ec217230fc083e217676e915bb786
feat(osconfig): update the api https://github.com/googleapis/google-api-python-client/commit/e079d43be4291ca10be7caf432012c6553e0398e
feat(oslogin): update the api https://github.com/googleapis/google-api-python-client/commit/d3ec653bdd293a63ae0b3772ce83e1fda73d5de5
feat(pubsub): update the api https://github.com/googleapis/google-api-python-client/commit/06dfff22baec2551508b93e29e4c36fa442ab299
feat(pubsublite): update the api https://github.com/googleapis/google-api-python-client/commit/4287a7d537741391a9afe9e669b98010ed4fc0ab
feat(recaptchaenterprise): update the api https://github.com/googleapis/google-api-python-client/commit/ebfeb8fc00a1c6a8603b35640845c5cdacf53cb2
feat(recommender): update the api https://github.com/googleapis/google-api-python-client/commit/01f2d6cc989ce337537a51ead8ffd3d6fc7e6c5d
feat(speech): update the api https://github.com/googleapis/google-api-python-client/commit/601afcf08fd96421b64ef4c6f098f09f0748ce69
feat(sqladmin): update the api https://github.com/googleapis/google-api-python-client/commit/41d51e34759b181692ed96d9d490a9cfc5a28459
feat(tagmanager): update the api https://github.com/googleapis/google-api-python-client/commit/47a522aac79ae9283a0c7ee7a2d0716e605d8c21
feat(transcoder): update the api https://github.com/googleapis/google-api-python-client/commit/1e0b0854e31f52013a8c5423efbd5e34c953e08c
diff --git a/googleapiclient/discovery_cache/documents/mybusinessaccountmanagement.v1.json b/googleapiclient/discovery_cache/documents/mybusinessaccountmanagement.v1.json
index b6e3620..9aa2c6a 100644
--- a/googleapiclient/discovery_cache/documents/mybusinessaccountmanagement.v1.json
+++ b/googleapiclient/discovery_cache/documents/mybusinessaccountmanagement.v1.json
@@ -530,7 +530,7 @@
       }
     }
   },
-  "revision": "20210731",
+  "revision": "20210806",
   "rootUrl": "https://mybusinessaccountmanagement.googleapis.com/",
   "schemas": {
     "AcceptInvitationRequest": {