Bump redcarpet from 3.5.0 to 3.5.1 (#36)

Bumps [redcarpet](https://github.com/vmg/redcarpet) from 3.5.0 to 3.5.1.
- [Release notes](https://github.com/vmg/redcarpet/releases)
- [Changelog](https://github.com/vmg/redcarpet/blob/master/CHANGELOG.md)
- [Commits](vmg/redcarpet@v3.5.0...v3.5.1)

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

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

Gemfile.lock

@@ -198,7 +198,7 @@ GEM
     plist (3.5.0)
     public_suffix (4.0.5)
     rake (13.0.1)
-    redcarpet (3.5.0)
+    redcarpet (3.5.1)
     representable (3.0.4)
       declarative (< 0.1.0)
       declarative-option (< 0.2.0)