Add missing closing tag

website/themes/uppy/layout/partials/social.ejs

@@ -7,4 +7,5 @@ allowtransparency="true" frameborder="0" scrolling="0" width="100" height="20"><
    <span class="wrapper">
      <a href="https://travis-ci.org/transloadit/uppy"><img src="https://travis-ci.org/transloadit/uppy.svg" alt="Build Status"></a>
    </span>
+  </li>
 </ul>