Build: Bump google-auth from 2.55.1 to 2.55.2

Bumps [google-auth](https://github.com/googleapis/google-cloud-python) from 2.55.1 to 2.55.2.
- [Release notes](https://github.com/googleapis/google-cloud-python/releases)
- [Changelog](https://github.com/googleapis/google-cloud-python/blob/main/packages/google-cloud-documentai/CHANGELOG.md)
- [Commits](googleapis/google-cloud-python@google-auth-v2.55.1...google-auth-v2.55.2)

---
updated-dependencies:
- dependency-name: google-auth
  dependency-version: 2.55.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]