fix uk flag link

templates/navbar.html

@@ -81,7 +81,6 @@
           <a class="nav-link" href="{{ conf['TWITTER'] }}">Twitter</a>
         </li>
         {% endif %}
-
 	{% if conf["LANGUAGE"] == "en" %}
         <li>
 	  <a class="nav-link flag" href="/"
@@ -93,13 +92,12 @@
 	{% elif conf["LANGUAGE"] == "de" %}
         <li>
           <a class="nav-link flag" href="/en/"
-		  style="background-image: url('https://potaris.de/picture/lang/uk-flag.png');">
+		  style="background-image: url('https://potaris.de/picture/lang/uk-flag.svg');">
 		  <div class="hover-to-75 foce-fill">
 		  </div>
 	  </a>
         </li>
 	{% endif %}
-
       </ul>
       
     </div>