Bump rouge from 3.27.0 to 3.28.0

Bumps [rouge](https://github.com/rouge-ruby/rouge) from 3.27.0 to 3.28.0.
- [Release notes](https://github.com/rouge-ruby/rouge/releases)
- [Changelog](https://github.com/rouge-ruby/rouge/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rouge-ruby/rouge/compare/v3.27.0...v3.28.0)

Gemfile

@@ -4,7 +4,7 @@ source 'https://rubygems.org'
 # List of required gems
 gem 'jekyll', '~> 4.2.1'
 gem 'jekyll-paginate', '~> 1.1.0'
-gem 'rouge', '~> 3.27.0'
+gem 'rouge', '~> 3.28.0'
 gem 'jekyll-redirect-from', '~> 0.16.0'
 gem 'jekyll-feed', '~> 0.16.0'
 gem "jekyll-sitemap", "~> 1.4"

Gemfile.lock

@@ -73,7 +73,7 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     rexml (3.2.5)
-    rouge (3.27.0)
+    rouge (3.28.0)
     safe_yaml (1.0.5)
     sassc (2.4.0)
       ffi (~> 1.9)
@@ -96,7 +96,7 @@ DEPENDENCIES
   jekyll-paginate (~> 1.1.0)
   jekyll-redirect-from (~> 0.16.0)
   jekyll-sitemap (~> 1.4)
-  rouge (~> 3.27.0)
+  rouge (~> 3.28.0)
   webrick (~> 1.7)
   yaml-lint (~> 0.0.7)