Warn re:status for official octokit libraries (github#16718)

Author: jsoref

content/rest/overview/libraries.md

@@ -18,12 +18,18 @@ topics:
   <h1>Octokit comes in many flavors</h1>
   <p class="lead">Use the official Octokit library, or choose between any of the available third party libraries.</p>
   <div class="octokit-links"><br/>
-     <div class="octokit-language"> <span>Ruby → </span><a href="https://github.com/octokit/octokit.rb">octokit.rb</a></div><br/>
+     <div class="octokit-language"><span>Ruby → </span><a href="https://github.com/octokit/octokit.rb">octokit.rb</a></div><br/>
      <div class="octokit-language"><span>.NET → </span> <a href="https://github.com/octokit/octokit.net">octokit.net</a></div><br/>
      <div class="octokit-language"><span>JavaScript → </span> <a href="https://github.com/octokit/octokit.js">octokit/octokit.js</a></div><br/>
   </div>
 </div>
 
+{% warning %}
+
+Warning: As of late October 2021, the offical Octokit libraries are not currently maintained.
+
+{% endwarning %}
+
 # Third-party libraries
 
 ### Clojure