chore(deps): bump @google-cloud/pubsub from 4.11.0 to 5.0.0

Bumps [@google-cloud/pubsub](https://github.com/googleapis/nodejs-pubsub) from 4.11.0 to 5.0.0.
- [Release notes](https://github.com/googleapis/nodejs-pubsub/releases)
- [Changelog](https://github.com/googleapis/nodejs-pubsub/blob/main/CHANGELOG.md)
- [Commits](googleapis/nodejs-pubsub@v4.11.0...v5.0.0)

---
updated-dependencies:
- dependency-name: "@google-cloud/pubsub"
  dependency-version: 5.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]