[downloads.html] typo fix (#135)

Author: arthurzenika

_includes/downloads.html

@@ -28,7 +28,7 @@ <h4 class="service-heading">Virtual Machines</h4>
                     </ul>
                     <h4 class="service-heading">Docker Images</h4>
                     <ul>
-                        <li>Docker image documenation located on: <a href="https://github.com/librenms/docker">GitHub LibreNMS/Docker</a></li>
+                        <li>Docker image documentation located on: <a href="https://github.com/librenms/docker">GitHub LibreNMS/Docker</a></li>
                         <li>LibreNMS on: <a href="https://hub.docker.com/r/librenms/librenms/">dockerhub</a></li>
                         <li>LibreNMS on: <a href="https://quay.io/repository/librenms/librenms">QUAY</a></li>
                     </ul>