[FEAT] Adding link to newsletter (BUG #7)

templates/pages/main/about.html

@@ -102,10 +102,13 @@
                 <div class="panel-body">
                     <div class="container">
                         <ul>
+                            <li>
+                                Newsletters : <a target="blank" href="https://phplist.iscpif.fr/?p=subscribe&id=2">subscribe</a>
+                            </li>
                             <li>
                                 Mailing-lists
                                 <ul>
-                                    <li>User mailing-list: soon</li>
+                                    <li>User mailing-list: soon </li>
                                     <li>Devel mailing-list: soon</li>
                                 </ul>
                             </li>