Bump gitpython from 3.1.29 to 3.1.32 in /docs

Bumps [gitpython](https://github.com/gitpython-developers/GitPython) from 3.1.29 to 3.1.32.
- [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...3.1.32)

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

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

docs/requirements_docs.txt

@@ -23,7 +23,7 @@ fastjsonschema==2.16.2
 fonttools==4.38.0 
 fsspec==2022.10.0 
 gitdb==4.0.9 
-gitpython==3.1.29 
+gitpython==3.1.32 
 h5py==3.7.0 
 importlib-metadata==5.0.0 
 iteration_utilities==0.11.0