Bump git/ext/gitdb from 3d3e957 to b653923

Bumps [git/ext/gitdb](https://github.com/gitpython-developers/gitdb) from `3d3e957` to `b653923`.
- [Release notes](https://github.com/gitpython-developers/gitdb/releases)
- [Commits](gitpython-developers/gitdb@3d3e957...b653923)

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

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