Bump google-github-actions/auth from 2.1.4 to 2.1.5 (#2871)

Bumps [google-github-actions/auth](https://github.com/google-github-actions/auth) from 2.1.4 to 2.1.5.
- [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@v2.1.4...v2.1.5)

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

.github/workflows/deploy_nais.yaml

@@ -76,7 +76,7 @@ jobs:
 
       - id: "auth"
         name: "Authenticate to Google Cloud"
-        uses: "google-github-actions/auth@v2.1.4"
+        uses: "google-github-actions/auth@v2.1.5"
         with:
           workload_identity_provider: "projects/906675412832/locations/global/workloadIdentityPools/ssb-identity-pool/providers/github-oidc-provider"
           service_account: "gh-ssb@nais-management-b3a7.iam.gserviceaccount.com"