build(deps): bump google-github-actions/auth from 1 to 2

Bumps [google-github-actions/auth](https://github.com/google-github-actions/auth) from 1 to 2.
- [Release notes](https://github.com/google-github-actions/auth/releases)
- [Changelog](https://github.com/google-github-actions/auth/blob/main/CHANGELOG.md)
- [Commits](google-github-actions/auth@v1...v2)

---
updated-dependencies:
- dependency-name: google-github-actions/auth
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/docs-build.yml

@@ -102,7 +102,7 @@ jobs:
           path: docs/build/
 
       - name: Authenticate to Google Cloud
-        uses: google-github-actions/auth@v1
+        uses: google-github-actions/auth@v2
         with:
           credentials_json: ${{ secrets.GCS_SA_KEY }}