build(deps): bump google-github-actions/auth from 1.0.0 to 2.1.2 (#56)

Bumps [google-github-actions/auth](https://github.com/google-github-actions/auth) from 1.0.0 to 2.1.2.
- [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@v1.0.0...v2.1.2)

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

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

.github/workflows/main.yaml

@@ -41,7 +41,7 @@ jobs:
         run: echo "version=$(date +'%Y%m%d-%H%M%S')-$(git rev-parse --short HEAD)" >> ${GITHUB_OUTPUT}
       - id: "auth"
         name: "Authenticate to Google Cloud"
-        uses: "google-github-actions/auth@v1.0.0"
+        uses: "google-github-actions/auth@v2.1.2"
         with:
           workload_identity_provider: ${{ secrets.NAIS_IO_WORKLOAD_IDENTITY_PROVIDER }}
           service_account: "gh-authproxy@nais-io.iam.gserviceaccount.com"