Update sidebar.html

Author: nrios14

_includes/sidebar.html

@@ -80,6 +80,7 @@ <h3>CI Environment Reference</h3>
         <li><a href="/user/multi-os/">Building on Multiple Operating Systems</a></li>
         <li><a href="/user/multi-cpu-architectures/">Building on Multiple CPU Architectures</a></li>
         <li><a href="/user/environment-variables/">Environment Variables</a></li>
+        <li><a href="/user/environment-variables/">Account Environment Variables</a></li>
         <li><a href="/user/build-environment-updates/">Build Environment Updates</a></li>
         <li><a href="/user/ip-addresses/">Build Machines IP Addresses</a></li>
       </ul>