Bump gitpython from 3.1.34 to 3.1.37 (#225)

Bumps [gitpython](https://github.com/gitpython-developers/GitPython) from 3.1.34 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@3.1.34...3.1.37)

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

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

Author: dependabot[bot]

poetry.lock

@@ -15,7 +15,7 @@ black = "^21.7b0"
 mkdocs = "^1.4.3"
 mkdocs-material = "^7.3.6"
 mdx-truly-sane-lists = "^1.3"
-GitPython = "^3.1.34"
+GitPython = "^3.1.37"
 mike = "^1.1.2"
 pep8-naming = "^0.12.1"
 invoke = "^1.5.0"