Add a missing hdl: in html template.

landingpage/landingpageapp/templates/landingpage/cmip6_dataset.html

@@ -179,7 +179,7 @@
             {% else %}{% if list_of_parts_handles %}
                 <table>
                 {% for handle in list_of_parts_handles %}
-                    <tr><td><a href="http://hdl.handle.net/{{ handle }}/">{{ handle }}</a></td></tr>
+                    <tr><td><a href="http://hdl.handle.net/{{ handle }}/">hdl:{{ handle }}</a></td></tr>
                 {% endfor %}
                 </table>
             {% else %}