build(deps-dev): bump faker from 30.3.0 to 30.6.0 in /backend

Bumps [faker](https://github.com/joke2k/faker) from 30.3.0 to 30.6.0.
- [Release notes](https://github.com/joke2k/faker/releases)
- [Changelog](https://github.com/joke2k/faker/blob/master/CHANGELOG.md)
- [Commits](joke2k/faker@v30.3.0...v30.6.0)

---
updated-dependencies:
- dependency-name: faker
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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