Bump gix from 0.67.0 to 0.68.0 in the deps group (#39)

Bumps the deps group with 1 update: [gix](https://github.com/GitoxideLabs/gitoxide).


Updates `gix` from 0.67.0 to 0.68.0
- [Release notes](https://github.com/GitoxideLabs/gitoxide/releases)
- [Changelog](https://github.com/GitoxideLabs/gitoxide/blob/main/CHANGELOG.md)
- [Commits](GitoxideLabs/gitoxide@gix-v0.67.0...gix-v0.68.0)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>