Bump gitpython from 3.1.36 to 3.1.37 in /docker/privx-api

Bumps [gitpython](https://github.com/gitpython-developers/GitPython) from 3.1.36 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@3.1.36...3.1.37)

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

Signed-off-by: dependabot[bot] <[email protected]>