Bump git/ext/gitdb from 39d7dbf to 22ebeaa

Bumps [git/ext/gitdb](https://github.com/gitpython-developers/gitdb) from `39d7dbf` to `22ebeaa`.
- [Release notes](https://github.com/gitpython-developers/gitdb/releases)
- [Commits](gitpython-developers/gitdb@39d7dbf...22ebeaa)

---
updated-dependencies:
- dependency-name: git/ext/gitdb
  dependency-version: 22ebeaae4083875603d5b7435fc1df99b04a598a
  dependency-type: direct:production
...

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