build(deps): bump gix from 0.55.2 to 0.56.0 (helix-editor#9055)

* build(deps): bump gix from 0.55.2 to 0.56.0

Bumps [gix](https://github.com/Byron/gitoxide) from 0.55.2 to 0.56.0.
- [Release notes](https://github.com/Byron/gitoxide/releases)
- [Changelog](https://github.com/Byron/gitoxide/blob/main/CHANGELOG.md)
- [Commits](GitoxideLabs/gitoxide@gix-v0.55.2...gix-v0.56.0)

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

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

* Adapt to changes in gix EntryMode/EntryKind

The rest of the gix codebase now calls `.kind()` on the mode and uses
the renamed `EntryKind` enum.

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Michael Davis <mcarsondavis@gmail.com>