This documentation is for 7.2

Author: rafaelfranca

guides/source/layout.html.erb

@@ -10,7 +10,7 @@
   <link rel="stylesheet" type="text/css" href="stylesheets/highlight.css" data-turbo-track="reload">
 
   <link rel="icon" href="images/favicon.ico" sizes="any">
-  
+
   <link rel="apple-touch-icon" href="images/icon.png">
 
   <script src="javascripts/@hotwired--turbo.js" data-turbo-track="reload"></script>
@@ -58,7 +58,7 @@
             Version:
             <select class="guides-version">
               <option value="https://edgeguides.rubyonrails.org/"<%= " selected" if @edge %>>Edge</option>
-              <% %w[7.1 7.0 6.1 6.0 5.2 5.1 5.0 4.2 4.1 4.0 3.2 3.1 3.0 2.3].each do |version| %>
+              <% %w[7.2 7.1 7.0 6.1 6.0 5.2 5.1 5.0 4.2 4.1 4.0 3.2 3.1 3.0 2.3].each do |version| %>
                 <option value="https://guides.rubyonrails.org/v<%= version %>/"<%= " selected" if @version&.start_with?(version) %>><%= version %></option>
               <% end %>
             </select>