Update header.hbs

Author: lmccart

src/templates/partials/header.hbs

@@ -11,8 +11,7 @@ title: header
     <li><a href="http://pi.processing.org/">Processing for Pi</a></li>
     <li><a href="https://processingfoundation.org/">Processing Foundation</a></li>
   </ul>
-
   <a tabindex="1" href="#content" id="skip-to-content">Skip to main content</a>
 
   {{!-- <a id="promo-link" href="https://donorbox.org/supportp52020" target="_blank"><div id="promo">This season, we need your help! Click here to #SupportP5!</div></a> --}}
-</nav>
+</nav>