build: 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] <[email protected]>

Author: dependabot[bot]

requirements.txt

@@ -240,7 +240,7 @@ pydata-sphinx-theme==0.16.1
     # via
     #   rocm-docs-core (pyproject.toml)
     #   sphinx-book-theme
-pygithub==2.7.0
+pygithub==2.8.1
     # via rocm-docs-core (pyproject.toml)
 pygments==2.19.2
     # via