Fix Broken URL in about page

templates/pages/about.tmpl

@@ -14,7 +14,7 @@
         </p>
         <ul>
             <li class="pages-small">
-                Gitote is the software hosting platform. It was created in 2018 as an <a href="collaborate">open source project</a> 
+                Gitote is the software hosting platform. It was created in 2018 as an <a href="{{AppURL}}gitote/gitote">open source project</a> 
                 to help developers easily share and collaborate softwares.
             </li>
             <li class="pages-small">