Bump git/ext/gitdb from 775cfe8 to 9e68ea1

Bumps [git/ext/gitdb](https://github.com/gitpython-developers/gitdb) from `775cfe8` to `9e68ea1`.
- [Release notes](https://github.com/gitpython-developers/gitdb/releases)
- [Commits](gitpython-developers/gitdb@775cfe8...9e68ea1)

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

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

Author: dependabot[bot]