Bump redcarpet from 3.5.0 to 3.5.1

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-preview[bot] <support@dependabot.com>

Gemfile.lock

@@ -38,7 +38,7 @@ GEM
       ast (~> 2.4.1)
     rack (2.2.3)
     rainbow (3.0.0)
-    redcarpet (3.5.0)
+    redcarpet (3.5.1)
     regexp_parser (2.0.0)
     rexml (3.2.4)
     rspec (3.10.0)