Fixes #1203: Add better documentation on how clients should handle file renames

Author: dbaeumer

Gemfile

@@ -1,19 +1,20 @@
 source "https://rubygems.org"
 ruby RUBY_VERSION
 
-gem "jekyll", "3.6.2"
+# gem "jekyll", "3.6.2"
 
 # to use GitHub Pages
 # gem "github-pages", group: :jekyll_plugins
 
+gem "github-pages", "~> 225", group: :jekyll_plugins
+
 # If you have any plugins, put them here!
 group :jekyll_plugins do
    gem "jemoji"
-   gem "github-pages"
+   gem 'jekyll-redirect-from'
    gem "jekyll-remote-theme"
 end
 
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
 gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
 
-gem 'jekyll-redirect-from'