Bump git/ext/gitdb from 0a019a2 to 4950ea9

Bumps [git/ext/gitdb](https://github.com/gitpython-developers/gitdb) from `0a019a2` to `4950ea9`.
- [Release notes](https://github.com/gitpython-developers/gitdb/releases)
- [Commits](gitpython-developers/gitdb@0a019a2...4950ea9)

---
updated-dependencies:
- dependency-name: git/ext/gitdb
  dependency-version: 4950ea91247905d094fc4cc1e0b26282aad6afa4
  dependency-type: direct:production
...

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Author: dependabot[bot]