Change image url for sourceforge to use https.

Makes chrome now report page is secure. It was a mix of http and https
content and thus not secure.

Author: rouilj

website/www/_templates/layout.html

@@ -114,7 +114,7 @@
       {%- if last_updated %}
         {% trans last_updated=last_updated|e %}Last updated on {{ last_updated }}.{% endtrans %}
       {%- endif %}
-      <span>Hosted by <a href="http://sourceforge.net"><img src="http://sflogo.sourceforge.net/sflogo.php?group_id=31577&amp;type=1" width="88" height="31" border="0" alt="SourceForge.net Logo" /></a></span>
+      <span>Hosted by <a href="https://sourceforge.net"><img src="https://sflogo.sourceforge.net/sflogo.php?group_id=31577&amp;type=1" width="88" height="31" border="0" alt="SourceForge.net Logo" /></a></span>
       </div>
     </div>
 {%- endblock %}