Bump git/ext/gitdb from 8ec2390 to ec58b7e

Bumps [git/ext/gitdb](https://github.com/gitpython-developers/gitdb) from `8ec2390` to `ec58b7e`.
- [Release notes](https://github.com/gitpython-developers/gitdb/releases)
- [Commits](gitpython-developers/gitdb@8ec2390...ec58b7e)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]