Upgrade: [dependabot] - bump pygithub from 2.8.1 to 2.9.0

Bumps [pygithub](https://github.com/pygithub/pygithub) from 2.8.1 to 2.9.0.
- [Release notes](https://github.com/pygithub/pygithub/releases)
- [Changelog](https://github.com/PyGithub/PyGithub/blob/main/doc/changes.rst)
- [Commits](PyGithub/PyGithub@v2.8.1...v2.9.0)

---
updated-dependencies:
- dependency-name: pygithub
  dependency-version: 2.9.0
  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 @@ package-mode = false
 
 [tool.poetry.dependencies]
 python = "^3.14"
-pygithub = "^2.8.1"
+pygithub = "^2.9.0"
 requests = "^2.33.0"
 
 [tool.poetry.scripts]