Bump pygithub from 1.58.2 to 1.59.1

Bumps [pygithub](https://github.com/pygithub/pygithub) from 1.58.2 to 1.59.1.
- [Release notes](https://github.com/pygithub/pygithub/releases)
- [Changelog](https://github.com/PyGithub/PyGithub/blob/v1.59.1/doc/changes.rst)
- [Commits](PyGithub/PyGithub@v1.58.2...v1.59.1)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -24,4 +24,4 @@ itsdangerous==2.0.1
 google-api-python-client==2.94.0
 google-cloud-storage==2.10.0
 cffi==1.15.1
-PyGithub==1.58.2
+PyGithub==1.59.1