Bump gitpython from 3.1.29 to 3.1.30 in /dev-support

Bumps [gitpython](https://github.com/gitpython-developers/GitPython) from 3.1.29 to 3.1.30.
- [Release notes](https://github.com/gitpython-developers/GitPython/releases)
- [Changelog](https://github.com/gitpython-developers/GitPython/blob/main/CHANGES)
- [Commits](gitpython-developers/GitPython@3.1.29...3.1.30)

---
updated-dependencies:
- dependency-name: gitpython
  dependency-type: direct:production
...

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

dev-support/python-requirements.txt

@@ -17,6 +17,6 @@
 #
 requests==2.28.1
 future==0.18.2
-gitpython==3.1.29
+gitpython==3.1.30
 rbtools==4.0
 jinja2==3.1.2