build(deps): bump diesel_migrations from 2.1.0 to 2.2.0

Bumps [diesel_migrations](https://github.com/diesel-rs/diesel) from 2.1.0 to 2.2.0.
- [Release notes](https://github.com/diesel-rs/diesel/releases)
- [Changelog](https://github.com/diesel-rs/diesel/blob/master/CHANGELOG.md)
- [Commits](diesel-rs/diesel@v2.1.0...v2.2.0)

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

Signed-off-by: dependabot[bot] <[email protected]>