Bump redcarpet from 3.5.0 to 3.6.0

Bumps [redcarpet](https://github.com/vmg/redcarpet) from 3.5.0 to 3.6.0.
- [Release notes](https://github.com/vmg/redcarpet/releases)
- [Changelog](https://github.com/vmg/redcarpet/blob/master/CHANGELOG.md)
- [Commits](vmg/redcarpet@v3.5.0...v3.6.0)

---
updated-dependencies:
- dependency-name: redcarpet
  dependency-type: indirect
...

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

Gemfile.lock

@@ -79,7 +79,7 @@ GEM
     nap (1.1.0)
     netrc (0.11.0)
     open4 (1.3.4)
-    redcarpet (3.5.0)
+    redcarpet (3.6.0)
     rouge (3.19.0)
     ruby-macho (1.4.0)
     sassc (2.4.0)