chore: release 0.81.0 (#3860)

🤖 I have created a release \*beep\* \*boop\*
---
## [0.81.0](https://www.github.com/googleapis/google-cloud-go/compare/v0.80.0...v0.81.0) (2021-04-02)


### Features

* **datacatalog:** Policy Tag Manager v1 API service feat: new RenameTagTemplateFieldEnumValue API feat: adding fully_qualified_name in lookup and search feat: added DATAPROC_METASTORE integrated system along with new entry types: DATABASE and SERVICE docs: Documentation improvements ([2b02a03](https://www.github.com/googleapis/google-cloud-go/commit/2b02a03ff9f78884da5a8e7b64a336014c61bde7))
* **dialogflow/cx:** include original user query in WebhookRequest; add GetTextCaseresult API. doc: clarify resource format for session response. ([a0b1f6f](https://www.github.com/googleapis/google-cloud-go/commit/a0b1f6faae77d014fdee166ab018ddcd6f846ab4))
* **dialogflow/cx:** include original user query in WebhookRequest; add GetTextCaseresult API. doc: clarify resource format for session response. ([b5b4da6](https://www.github.com/googleapis/google-cloud-go/commit/b5b4da6952922440d03051f629f3166f731dfaa3))
* **dialogflow:** expose MP3_64_KBPS and MULAW for output audio encodings. ([b5b4da6](https://www.github.com/googleapis/google-cloud-go/commit/b5b4da6952922440d03051f629f3166f731dfaa3))
* **secretmanager:** Rotation for Secrets ([2b02a03](https://www.github.com/googleapis/google-cloud-go/commit/2b02a03ff9f78884da5a8e7b64a336014c61bde7))


### Bug Fixes

* **internal/godocfx:** filter out non-Cloud ([#3878](https://www.github.com/googleapis/google-cloud-go/issues/3878)) ([625aef9](https://www.github.com/googleapis/google-cloud-go/commit/625aef9b47181cf627587cc9cde9e400713c6678))

This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please).

CHANGES.md

@@ -1,6 +1,22 @@
 # Changes
 
 
+## [0.81.0](https://www.github.com/googleapis/google-cloud-go/compare/v0.80.0...v0.81.0) (2021-04-02)
+
+
+### Features
+
+* **datacatalog:** Policy Tag Manager v1 API service feat: new RenameTagTemplateFieldEnumValue API feat: adding fully_qualified_name in lookup and search feat: added DATAPROC_METASTORE integrated system along with new entry types: DATABASE and SERVICE docs: Documentation improvements ([2b02a03](https://www.github.com/googleapis/google-cloud-go/commit/2b02a03ff9f78884da5a8e7b64a336014c61bde7))
+* **dialogflow/cx:** include original user query in WebhookRequest; add GetTextCaseresult API. doc: clarify resource format for session response. ([a0b1f6f](https://www.github.com/googleapis/google-cloud-go/commit/a0b1f6faae77d014fdee166ab018ddcd6f846ab4))
+* **dialogflow/cx:** include original user query in WebhookRequest; add GetTextCaseresult API. doc: clarify resource format for session response. ([b5b4da6](https://www.github.com/googleapis/google-cloud-go/commit/b5b4da6952922440d03051f629f3166f731dfaa3))
+* **dialogflow:** expose MP3_64_KBPS and MULAW for output audio encodings. ([b5b4da6](https://www.github.com/googleapis/google-cloud-go/commit/b5b4da6952922440d03051f629f3166f731dfaa3))
+* **secretmanager:** Rotation for Secrets ([2b02a03](https://www.github.com/googleapis/google-cloud-go/commit/2b02a03ff9f78884da5a8e7b64a336014c61bde7))
+
+
+### Bug Fixes
+
+* **internal/godocfx:** filter out non-Cloud ([#3878](https://www.github.com/googleapis/google-cloud-go/issues/3878)) ([625aef9](https://www.github.com/googleapis/google-cloud-go/commit/625aef9b47181cf627587cc9cde9e400713c6678))
+
 ## [0.80.0](https://www.github.com/googleapis/google-cloud-go/compare/v0.79.0...v0.80.0) (2021-03-23)