Bump gix-submodule from 0.21.0 to 0.22.0

Bumps [gix-submodule](https://github.com/GitoxideLabs/gitoxide) from 0.21.0 to 0.22.0.
- [Release notes](https://github.com/GitoxideLabs/gitoxide/releases)
- [Changelog](https://github.com/GitoxideLabs/gitoxide/blob/main/CHANGELOG.md)
- [Commits](GitoxideLabs/gitoxide@gix-submodule-v0.21.0...gix-submodule-v0.22.0)

---
updated-dependencies:
- dependency-name: gix-submodule
  dependency-version: 0.22.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -29,7 +29,7 @@ gix = { version = "0.75.0", default-features = false }
 gix-hash = "0.19.0"
 gix-object = "0.50.2"
 gix-config = "0.47.1"
-gix-submodule = "0.21.0"
+gix-submodule = "0.22.0"
 hyper-reverse-proxy = { path = "hyper-reverse-proxy", version = "0.0.1" }
 libc = "0.2.178"
 regex = "1.12.2"