build(deps): bump pygithub from 1.59.0 to 1.59.1 in /tools/release

Bumps [pygithub](https://github.com/pygithub/pygithub) from 1.59.0 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@v1.59.0...v1.59.1)

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

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

Author: dependabot[bot]

tools/release/requirements.txt

@@ -1,2 +1,2 @@
-PyGithub==1.59.0
+PyGithub==1.59.1
 pytest==7.4.0