wireguard: Fix format when showing multiple endpoints of the server

- Show them in multiple lines using <pre> like before.

Tests:

- Multiple endpoints are shown in the one line each using <pre> tag.

Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: James Valleroy <jvalleroy@mailbox.org>

plinth/modules/wireguard/templates/wireguard.html

@@ -31,8 +31,9 @@
             <tr>
               <td>{% trans "Endpoint(s)" %}</td>
               <td>
-              {% for endpoint in server_endpoints %}{{ endpoint }}
+                <pre>{% for endpoint in server_endpoints %}{{ endpoint }}
-{% endfor %}</td>
+{% endfor %}</pre>
+              </td>
           </tr>
           <tr>
             <td>
@@ -104,7 +105,6 @@
     </div>
   {% endif %}
 
-
   <h3>{% trans "As a Client" %}</h3>
   <p>
     {% blocktrans trimmed %}