Bump rubocop-rails from 2.12.3 to 2.12.4 (#16869)

Bump rubocop-rails from 2.12.3 to 2.12.4 (#16869)

Bumps [rubocop-rails](https://github.com/rubocop/rubocop-rails) from 2.12.3 to 2.12.4.
- [Release notes](https://github.com/rubocop/rubocop-rails/releases)
- [Changelog](https://github.com/rubocop/rubocop-rails/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop/rubocop-rails/compare/v2.12.3...v2.12.4)

---
updated-dependencies:
- dependency-name: rubocop-rails
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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