build(deps): bump pygithub from 2.7.0 to 2.8.1

Bumps [pygithub](https://github.com/pygithub/pygithub) from 2.7.0 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@v2.7.0...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]

poetry.lock

@@ -17,7 +17,7 @@ sebaubuntu-libs = "^1.5.0"
 twrpdtgen = "^3.0.0"
 deepl = "^1.22.0"
 speedtest-cli = "^2.1.3"
-PyGithub = "^2.7"
+PyGithub = "^2.8"
 GitPython = "^3.1.45"
 paramiko = "^3.5.1"
 colour = "^0.1.5"