Bump cities-json from 0.5.0 to 0.5.1 in /rust

Bumps [cities-json](https://github.com/ringsaturn/go-cities.json) from 0.5.0 to 0.5.1.
- [Release notes](https://github.com/ringsaturn/go-cities.json/releases)
- [Commits](ringsaturn/go-cities.json@v0.5.0...v0.5.1)

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

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