build(deps): bump proto-plus from 1.22.1 to 1.22.2

Bumps [proto-plus](https://github.com/googleapis/proto-plus-python) from 1.22.1 to 1.22.2.
- [Release notes](https://github.com/googleapis/proto-plus-python/releases)
- [Changelog](https://github.com/googleapis/proto-plus-python/blob/main/CHANGELOG.md)
- [Commits](https://github.com/googleapis/proto-plus-python/compare/v1.22.1...v1.22.2)

---
updated-dependencies:
- dependency-name: proto-plus
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -51,7 +51,7 @@ packaging==23.0
 pbr==5.11.0
 praw==7.6.1
 prawcore==2.3.0
-proto-plus==1.22.1
+proto-plus==1.22.2
 protobuf==3.20.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.8