Bump google-github-actions/auth from 2.1.7 to 2.1.8

Bumps [google-github-actions/auth](https://github.com/google-github-actions/auth) from 2.1.7 to 2.1.8.
- [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@6fc4af4...71f9864)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/obs.yml

@@ -126,7 +126,7 @@ jobs:
       id-token: write
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
-      - uses: google-github-actions/auth@6fc4af4b145ae7821d527454aa9bd537d1f2dc5f # v2.1.7
+      - uses: google-github-actions/auth@71f986410dfbc7added4569d411d040a91dc6935 # v2.1.8
         if: ${{ inputs.skip-bundles == false && github.event_name != 'pull_request' }}
         with:
           credentials_json: ${{ secrets.GCS_CRIO_SA }}