build(deps): bump pygithub from 2.1.1 to 2.2.0 in /tools/release (#591)

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:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

tools/release/requirements.txt

@@ -1,2 +1,2 @@
-PyGithub==2.1.1
+PyGithub==2.2.0
 pytest==8.0.0