Merge pull request #80 from GeoNode/summit-2020

relabeled summit button for 2020

Author: Alessio Fabiani

index.html

@@ -22,7 +22,7 @@ <h1>Open Source Geospatial Content Management System</h1>
             It is designed to be extended and modified, and can be integrated into existing platforms.
           </p>
           <p>
-            <a href="http://summit.geonode.org/" class="btn btn-md btn-success" target="_blank">GeoNode summit 2019</a>
+            <a href="http://summit.geonode.org/" class="btn btn-md btn-success" target="_blank">GeoNode summit 2020</a>
           </p>
           <div class="promo-links">
             <a title="OSGeo Project" href="http://osgeo.org"><img style="background-color:white;" alt="OSGeo Project" src="https://svn.osgeo.org/osgeo/marketing/logo/png8/150/OSGeo_project.png"/></a>