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>

Gemfile.lock

@@ -63,7 +63,7 @@ GEM
       rack (>= 1.0)
       rack-test (>= 0.5)
     rake (13.0.3)
-    redcarpet (3.5.0)
+    redcarpet (3.5.1)
     regexp_parser (1.8.2)
     rspec (3.10.0)
       rspec-core (~> 3.10.0)