build(deps): bump google-github-actions/auth from 2.1.5 to 2.1.6

Bumps [google-github-actions/auth](https://github.com/google-github-actions/auth) from 2.1.5 to 2.1.6.
- [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@62cf5bd...8254fb7)

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

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

action.yaml

@@ -37,7 +37,7 @@ runs:
       shell: bash
 
     - name: 'Authenticate to Google Cloud'
-      uses: 'google-github-actions/auth@62cf5bd3e4211a0a0b51f2c6d6a37129d828611d'
+      uses: 'google-github-actions/auth@8254fb75a33b976a221574d287e93919e6a36f70'
       with:
         workload_identity_provider: ${{ inputs.workloadIdentityProvider }}
         service_account: ${{ inputs.serviceAccount }}