chore(deps): bump gix from 0.83.0 to 0.84.0 in /bots/rhodibot

Bumps [gix](https://github.com/GitoxideLabs/gitoxide) from 0.83.0 to 0.84.0.
- [Release notes](https://github.com/GitoxideLabs/gitoxide/releases)
- [Changelog](https://github.com/GitoxideLabs/gitoxide/blob/main/CHANGELOG.md)
- [Commits](GitoxideLabs/gitoxide@gix-v0.83.0...gix-v0.84.0)

---
updated-dependencies:
- dependency-name: gix
  dependency-version: 0.84.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]