Bump python-gitlab from 4.12.0 to 4.12.1 (#1331)

Bumps [python-gitlab](https://github.com/python-gitlab/python-gitlab) from 4.12.0 to 4.12.1.
- [Release notes](https://github.com/python-gitlab/python-gitlab/releases)
- [Changelog](https://github.com/python-gitlab/python-gitlab/blob/main/CHANGELOG.md)
- [Commits](python-gitlab/python-gitlab@v4.12.0...v4.12.1)

---
updated-dependencies:
- dependency-name: python-gitlab
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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