fixed OTB Hackfest 2015 link

Author: anushacs-dell

themes/zoo-project/layouts/about/event.html

@@ -287,7 +287,7 @@ <h2>Past events</h2>
        <tr>
         <td><i class="fa fa-microphone"></td>
         <td>OTB Support in ZOO-Project</td>
-        <td><a href="http://wiki.orfeo-toolbox.org/index.php/OTB_Users_meeting_and_hackfest_2015" target="_blank">OTB Hackfest 2015</a></td>
+        <td><a href="https://www.orfeo-toolbox.org/report-from-the-first-otb-users-days-in-toulouse/" target="_blank">OTB Hackfest 2015</a></td>
          <td style="width:10%"><date>2015-06-03</date></td>
         <td style="width:13%" class="hidden-xs">43.5940,1.4210</td> 
         <td style="width:10%">Toulouse</td>