build(deps): bump mlua from 0.9.0 to 0.9.1

Bumps [mlua](https://github.com/khvzak/mlua) from 0.9.0 to 0.9.1.
- [Changelog](https://github.com/khvzak/mlua/blob/master/CHANGELOG.md)
- [Commits](mlua-rs/mlua@v0.9.0...v0.9.1)

---
updated-dependencies:
- dependency-name: mlua
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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