Bump google-github-actions/auth from 1.1.1 to 2.1.5 (#474)

Bumps [google-github-actions/auth](https://github.com/google-github-actions/auth) from 1.1.1 to 2.1.5.
- [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@35b0e87...62cf5bd)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/deploy.yml

@@ -21,7 +21,7 @@ jobs:
       uses: hashicorp/setup-terraform@633666f66e0061ca3b725c73b2ec20cd13a8fdd1
 
     - name: Authenticate to Google Cloud
-      uses: google-github-actions/auth@35b0e87d162680511bf346c299f71c9c5c379033 # v1.1.1
+      uses: google-github-actions/auth@62cf5bd3e4211a0a0b51f2c6d6a37129d828611d # v2.1.5
       with:
         project_id: ${{ secrets.GCP_PROJECT_ID }}
         credentials_json: ${{ secrets.TF_GOOGLE_CREDENTIALS }}