chore: release pubsub 1.12.2 (#4387)

:robot: I have created a release \*beep\* \*boop\*
---
### [1.12.2](https://www.github.com/googleapis/google-cloud-go/compare/pubsub/v1.12.1...pubsub/v1.12.2) (2021-07-08)


### Bug Fixes

* **pubsub:** retry all goaway errors ([#4384](https://www.github.com/googleapis/google-cloud-go/issues/4384)) ([1eae86f](https://www.github.com/googleapis/google-cloud-go/commit/1eae86f1882660d901b9fb0e8dab6f138a048dbb)), refs [#4257](https://www.github.com/googleapis/google-cloud-go/issues/4257)

This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please).
diff --git a/pubsub/CHANGES.md b/pubsub/CHANGES.md
index 6cfb5e0..2e02ba4 100644
--- a/pubsub/CHANGES.md
+++ b/pubsub/CHANGES.md
@@ -1,5 +1,12 @@
 # Changes
 
+### [1.12.2](https://www.github.com/googleapis/google-cloud-go/compare/pubsub/v1.12.1...pubsub/v1.12.2) (2021-07-08)
+
+
+### Bug Fixes
+
+* **pubsub:** retry all goaway errors ([#4384](https://www.github.com/googleapis/google-cloud-go/issues/4384)) ([1eae86f](https://www.github.com/googleapis/google-cloud-go/commit/1eae86f1882660d901b9fb0e8dab6f138a048dbb)), refs [#4257](https://www.github.com/googleapis/google-cloud-go/issues/4257)
+
 ### [1.12.1](https://www.github.com/googleapis/google-cloud-go/compare/pubsub/v1.12.0...pubsub/v1.12.1) (2021-07-01)