build(deps): bump pygithub from 2.3.0 to 2.4.0 in /requirements (#2700)

Bumps [pygithub](https://github.com/pygithub/pygithub) from 2.3.0 to 2.4.0.
- [Release notes](https://github.com/pygithub/pygithub/releases)
- [Changelog](https://github.com/PyGithub/PyGithub/blob/main/doc/changes.rst)
- [Commits](PyGithub/PyGithub@v2.3.0...v2.4.0)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
(cherry picked from commit c3b8945)

requirements/_tests.txt

@@ -11,7 +11,7 @@ pytest-xdist ==3.6.1
 phmdoctest ==1.4.0
 
 psutil <6.1.0
-pyGithub ==2.3.0
+pyGithub ==2.4.0
 fire <=0.6.0
 
 cloudpickle >1.3, <=3.0.0