Bump google-github-actions/auth from 1 to 2 (#19105)

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

Author: dependabot[bot]

.github/workflows/docs-build.yml

@@ -149,7 +149,7 @@ jobs:
           path: docs/build/html/
 
       - name: Authenticate to Google Cloud
-        uses: google-github-actions/auth@v1
+        uses: google-github-actions/auth@v2
         with:
           credentials_json: ${{ secrets.GCS_SA_KEY }}
 

.github/workflows/tpu-tests.yml

@@ -51,7 +51,7 @@ jobs:
         with:
           python-version: "3.10"
 
-      - uses: google-github-actions/auth@v1
+      - uses: google-github-actions/auth@v2
         with:
           credentials_json: ${{ secrets.GKE_SA_KEY_BASE64 }}
       - uses: "google-github-actions/setup-gcloud@v1"