add OARec autodiscovery to HTML collections template (#1072)

Author: tomkralidis

pycsw/ogc/api/templates/collections.html

@@ -23,7 +23,7 @@ <h2>Collections</h2>
       {% for col in data['collections']  %}
       <tr>
         <td data-label="name">
-          <a title="{{ col['title'] | striptags | truncate }}" href="{{ config['server']['url'] }}/collections/{{ col.id }}">
+          <a rel="http://www.opengis.net/def/rel/ogc/1.0/ogc-catalog" title="{{ col['title'] | striptags | truncate }}" href="{{ config['server']['url'] }}/collections/{{ col.id }}">
             <span>{{ col['title'] | striptags | truncate }}</span>
           </a>
         </td>