Bump gitpython from 3.1.18 to 3.1.30 in /examples/research_projects/decision_transformer (#21010)

Bump gitpython in /examples/research_projects/decision_transformer

Bumps [gitpython](https://github.com/gitpython-developers/GitPython) from 3.1.18 to 3.1.30.
- [Release notes](https://github.com/gitpython-developers/GitPython/releases)
- [Changelog](https://github.com/gitpython-developers/GitPython/blob/main/CHANGES)
- [Commits](https://github.com/gitpython-developers/GitPython/compare/3.1.18...3.1.30

)

---
updated-dependencies:
- dependency-name: gitpython
  dependency-type: direct:production
...
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examples/research_projects/decision_transformer/requirements.txt

@@ -67,7 +67,7 @@ fsspec==2022.2.0
 fugashi==1.1.2
 gast==0.5.3
 gitdb==4.0.9
-GitPython==3.1.18
+GitPython==3.1.30
 glfw==2.5.1
 google-auth==2.6.2
 google-auth-oauthlib==0.4.6