Bump redcarpet from 3.4.0 to 3.5.1 in /content

Bumps [redcarpet](https://github.com/vmg/redcarpet) from 3.4.0 to 3.5.1.
- [Release notes](https://github.com/vmg/redcarpet/releases)
- [Changelog](https://github.com/vmg/redcarpet/blob/master/CHANGELOG.md)
- [Commits](https://github.com/vmg/redcarpet/compare/v3.4.0...v3.5.1)

---
updated-dependencies:
- dependency-name: redcarpet
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/content/Gemfile b/content/Gemfile
index 951d138..61cbf57 100644
--- a/content/Gemfile
+++ b/content/Gemfile
@@ -1,4 +1,4 @@
 source 'https://rubygems.org'
 gem 'github-pages'
 # Optional dependency of jekyll
-gem "redcarpet", "~> 3.2", ">= 3.2.3"
+gem "redcarpet", "~> 3.5"
diff --git a/content/Gemfile.lock b/content/Gemfile.lock
index d6b8bf0..f2aa00f 100644
--- a/content/Gemfile.lock
+++ b/content/Gemfile.lock
@@ -206,7 +206,7 @@
     rb-fsevent (0.10.2)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
-    redcarpet (3.4.0)
+    redcarpet (3.5.1)
     rouge (2.2.1)
     ruby-enum (0.7.1)
       i18n
@@ -234,7 +234,7 @@
 
 DEPENDENCIES
   github-pages
-  redcarpet (~> 3.2, >= 3.2.3)
+  redcarpet (~> 3.5)
 
 BUNDLED WITH
    2.1.0.pre.1