Bump apps/on_ruby from `b4c9791` to `2174ec8`
Bump apps/on_ruby from `b4c9791` to `2174ec8`

Bumps [apps/on_ruby](https://github.com/phoet/on_ruby) from `b4c9791` to `2174ec8`.
- [Release notes](https://github.com/phoet/on_ruby/releases)
- [Commits](https://github.com/phoet/on_ruby/compare/b4c9791729cdf1668871ebf671bf8accb712918e...2174ec8e24cf45f5a350e1f9174361adf4bc703d)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
eliotsykes/real-world-rails