not working -> broken. fix #331 (#332)

Author: missytake

index.html

@@ -79,7 +79,7 @@ <h2 style="margin-bottom: 0.5em;">Does my email provider work with Chatmail?</h2
                         {% when 'PREPARATION' %}
                         <a class="status-prep" href=".{{provider.url}}">PREPARE</a>
                         {% when 'BROKEN' %}
-                        NOT WORKING
+                        BROKEN
                         {% endcase %}
                     </span>
             </td>