ci: bump GoogleCloudPlatform/release-please-action from 2 to 3 (#219)

Bumps [GoogleCloudPlatform/release-please-action](https://github.com/googlecloudplatform/release-please-action) from 2 to 3.
- [Release notes](https://github.com/googlecloudplatform/release-please-action/releases)
- [Changelog](https://github.com/google-github-actions/release-please-action/blob/main/CHANGELOG.md)
- [Commits](googleapis/release-please-action@v2...v3)

---
updated-dependencies:
- dependency-name: GoogleCloudPlatform/release-please-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/main.yml

@@ -161,7 +161,7 @@ jobs:
     ]
     if: github.event_name == 'push' && github.ref == 'refs/heads/main'
     steps:
-      - uses: GoogleCloudPlatform/release-please-action@v2
+      - uses: GoogleCloudPlatform/release-please-action@v3
         id: release
         with:
           token: ${{ secrets.GITHUB_TOKEN }}