Bump gitpython from 3.1.35 to 3.1.37 in /scripts (elastic#2292)

Bumps [gitpython](https://github.com/gitpython-developers/GitPython) from 3.1.35 to 3.1.37.
- [Release notes](https://github.com/gitpython-developers/GitPython/releases)
- [Changelog](https://github.com/gitpython-developers/GitPython/blob/main/CHANGES)
- [Commits](gitpython-developers/GitPython@3.1.35...3.1.37)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

scripts/requirements.txt

@@ -2,6 +2,6 @@ pip
 # License: MIT
 PyYAML==6.0
 # License: BSD
-gitpython==3.1.35
+gitpython==3.1.37
 # License: BSD
 Jinja2==3.0.3