Update dependency github-pages to v228

Author: mend-for-github-com[bot]

Gemfile

@@ -9,7 +9,7 @@ source "https://rubygems.org"
 
 # For Github Pages
 # gem "jekyll", "~> 4.2.0"
-gem "github-pages", "~> 212", group: :jekyll_plugins
+gem "github-pages", "~> 228", group: :jekyll_plugins
 
 # If you have any plugins, put them here!
 group :jekyll_plugins do