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[bot] <support@github.com>

Author: dependabot[bot]

Gemfile.lock

@@ -428,7 +428,7 @@ GEM
       i18n
       polyamorous (= 2.3.2)
     rdoc (6.2.1)
-    redcarpet (3.5.0)
+    redcarpet (3.5.1)
     regexp_parser (1.7.1)
     remotipart (1.4.4)
     representable (3.0.4)