Bump pygithub from 1.58.2 to 2.6.1

Bumps [pygithub](https://github.com/pygithub/pygithub) from 1.58.2 to 2.6.1.
- [Release notes](https://github.com/pygithub/pygithub/releases)
- [Changelog](https://github.com/PyGithub/PyGithub/blob/v2.6.1/doc/changes.rst)
- [Commits](PyGithub/PyGithub@v1.58.2...v2.6.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements.txt

@@ -26,7 +26,7 @@ djangorestframework==3.16.0
 html2text==2025.4.15
 humanize==4.12.3
 jira==3.8.0
-PyGithub==1.58.2
+PyGithub==2.6.1
 lxml==5.4.0
 Markdown==3.8
 openpyxl==3.1.5