Bump pygithub from 1.59.1 to 2.1.1 (#16535)

Bumps [pygithub](https://github.com/pygithub/pygithub) from 1.59.1 to 2.1.1.
- [Release notes](https://github.com/pygithub/pygithub/releases)
- [Changelog](https://github.com/PyGithub/PyGithub/blob/main/doc/changes.rst)
- [Commits](PyGithub/PyGithub@v1.59.1...v2.1.1)

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

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