Bump gix from 0.75.0 to 0.77.0 (#2826)

* Bump gix from 0.75.0 to 0.77.0

Bumps [gix](https://github.com/GitoxideLabs/gitoxide) from 0.75.0 to 0.77.0.
- [Release notes](https://github.com/GitoxideLabs/gitoxide/releases)
- [Changelog](https://github.com/GitoxideLabs/gitoxide/blob/main/CHANGELOG.md)
- [Commits](GitoxideLabs/gitoxide@gix-v0.75.0...gix-v0.77.0)

---
updated-dependencies:
- dependency-name: gix
  dependency-version: 0.77.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

* Adapt to API changes

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Christoph Rüßler <christoph.ruessler@mailbox.org>

Author: dependabot[bot]