Bump rails from 6.1.4.6 to 6.1.5 (#17791)

Bumps [rails](https://github.com/rails/rails) from 6.1.4.6 to 6.1.5.
- [Release notes](https://github.com/rails/rails/releases)
- [Commits](https://github.com/rails/rails/compare/v6.1.4.6...v6.1.5

)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>