Update pygithub requirement from ~=2.1 to ~=2.2

Updates the requirements on [pygithub](https://github.com/pygithub/pygithub) to permit the latest version.
- [Release notes](https://github.com/pygithub/pygithub/releases)
- [Changelog](https://github.com/PyGithub/PyGithub/blob/main/doc/changes.rst)
- [Commits](PyGithub/PyGithub@v2.1.0...v2.2.0)

---
updated-dependencies:
- dependency-name: pygithub
  dependency-type: direct:development
...

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

requirements-dev.txt

@@ -2,6 +2,6 @@
 black==23.11.0
 packaging==23.2
 pre-commit~=3.5
-PyGithub~=2.1
+PyGithub~=2.2
 pyupgrade~=3.15
 yamllint~=1.33