build(deps): bump google-github-actions/auth (#1012)

Bumps the action-dependencies group with 1 update: [google-github-actions/auth](https://github.com/google-github-actions/auth).


Updates `google-github-actions/auth` from 2.1.10 to 2.1.12
- [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@ba79af0...b7593ed)

---
updated-dependencies:
- dependency-name: google-github-actions/auth
  dependency-version: 2.1.12
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: action-dependencies
...

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

Author: dependabot[bot]

.github/workflows/test-kms.yml

@@ -34,7 +34,7 @@ jobs:
           pip install --upgrade tox
 
       - name: Authenticate to Google Cloud
-        uses: google-github-actions/auth@ba79af03959ebeac9769e648f473a284504d9193
+        uses: google-github-actions/auth@b7593ed2efd1c1617e1b0254da33b86225adb2a5
         with:
           token_format: access_token
           workload_identity_provider: projects/843741030650/locations/global/workloadIdentityPools/securesystemslib-tests/providers/securesystemslib-tests