Bump pygithub from 2.6.1 to 2.8.1

Bumps [pygithub](https://github.com/pygithub/pygithub) from 2.6.1 to 2.8.1.
- [Release notes](https://github.com/pygithub/pygithub/releases)
- [Changelog](https://github.com/PyGithub/PyGithub/blob/main/doc/changes.rst)
- [Commits](PyGithub/PyGithub@v2.6.1...v2.8.1)

---
updated-dependencies:
- dependency-name: pygithub
  dependency-version: 2.8.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -38,7 +38,7 @@ pigar==2.1.7
 pipreqs==0.5.0
 platformdirs==4.3.8
 pycparser==2.22
-PyGithub==2.6.1
+PyGithub==2.8.1
 PyJWT==2.10.1
 PyNaCl==1.5.0
 pyparsing==3.2.3