Bump gitpython from 3.1.2 to 3.1.37 in /docker/containers/zeek

Bumps [gitpython](https://github.com/gitpython-developers/GitPython) from 3.1.2 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@3.1.2...3.1.37)

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

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

docker/containers/zeek/requirements.txt

@@ -1,6 +1,6 @@
 btest==0.61
 configparser==5.0.0
 gitdb==4.0.5
-GitPython==3.1.2
+GitPython==3.1.37
 semantic-version==2.8.5
 smmap==3.0.4