chore(deps): 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]

pyproject.toml

@@ -16,7 +16,7 @@ dependencies = [
   "requests>=2.32.3",
   "pydantic>=2.9.2",
   "pydantic-settings>=2.0.0",
-  "PyGithub==2.6.1",
+  "PyGithub==2.8.1",
   "GitPython==3.1.44",
   "packaging>=24.2",
   "python-dotenv>=1.0.1",