chore: update contact email

Author: LDarki

contact.html

@@ -272,8 +272,8 @@
                                 <i class="fa fa-fw fa-at"></i>
                                 Our e-mail address:
                                 <strong>
-                                    <a href="mailto:duino.coin@gmail.com">
-                                        duino.coin@gmail.com
+                                    <a href="mailto:support@duinocoin.com">
+                                        support@duinocoin.com
                                     </a>
                                 </strong>
                             </p>