Bump pygithub from 2.1.1 to 2.2.0

Bumps [pygithub](https://github.com/pygithub/pygithub) from 2.1.1 to 2.2.0.
- [Release notes](https://github.com/pygithub/pygithub/releases)
- [Changelog](https://github.com/PyGithub/PyGithub/blob/main/doc/changes.rst)
- [Commits](PyGithub/PyGithub@v2.1.1...v2.2.0)

---
updated-dependencies:
- dependency-name: pygithub
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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