Bump redcarpet from 3.4.0 to 3.5.1 in /examples/rails6/test-emd
Bump redcarpet from 3.4.0 to 3.5.1 in /examples/rails6/test-emd

Bumps [redcarpet](https://github.com/vmg/redcarpet) from 3.4.0 to 3.5.1.
- [Release notes](https://github.com/vmg/redcarpet/releases)
- [Changelog](https://github.com/vmg/redcarpet/blob/master/CHANGELOG.md)
- [Commits](https://github.com/vmg/redcarpet/compare/v3.4.0...v3.5.1)

---
updated-dependencies:
- dependency-name: redcarpet
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
ytbryan/emd,ytbryan/emd,ytbryan/emd