chore: release 0.51.2 (#984)

🤖 I have created a release \*beep\* \*boop\*
---
### [0.51.2](https://www.github.com/googleapis/gapic-generator-python/compare/v0.51.1...v0.51.2) (2021-09-13)


### Bug Fixes

* add a separate DEFAULT_CLIENT_INFO for rest clients ([#988](https://www.github.com/googleapis/gapic-generator-python/issues/988)) ([22ac400](https://www.github.com/googleapis/gapic-generator-python/commit/22ac40097ab50bb2d3a7f1a2d35d659c391e0927))
* **snippetgen:** use f-strings in print statements ([#975](https://www.github.com/googleapis/gapic-generator-python/issues/975)) ([122e85c](https://www.github.com/googleapis/gapic-generator-python/commit/122e85c37ff6aa0a99f64361397eb3df5495a3b4))
---


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

CHANGELOG.md

@@ -1,5 +1,13 @@
 # Changelog
 
+### [0.51.2](https://www.github.com/googleapis/gapic-generator-python/compare/v0.51.1...v0.51.2) (2021-09-13)
+
+
+### Bug Fixes
+
+* add a separate DEFAULT_CLIENT_INFO for rest clients ([#988](https://www.github.com/googleapis/gapic-generator-python/issues/988)) ([22ac400](https://www.github.com/googleapis/gapic-generator-python/commit/22ac40097ab50bb2d3a7f1a2d35d659c391e0927))
+* **snippetgen:** use f-strings in print statements ([#975](https://www.github.com/googleapis/gapic-generator-python/issues/975)) ([122e85c](https://www.github.com/googleapis/gapic-generator-python/commit/122e85c37ff6aa0a99f64361397eb3df5495a3b4))
+
 ### [0.51.1](https://www.github.com/googleapis/gapic-generator-python/compare/v0.51.0...v0.51.1) (2021-08-20)