chore(deps): bump pygithub from 2.8.1 to 2.9.0 (#14574)

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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -25,7 +25,7 @@ djangorestframework==3.17.0
 html2text==2025.4.15
 humanize==4.15.0
 jira==3.10.5
-PyGithub==2.8.1
+PyGithub==2.9.0
 lxml==6.0.2
 Markdown==3.10.2
 openpyxl==3.1.5