add title to unlinking done page

src/authentic2_auth_msp/templates/authentic2_auth_msp/unlink_done.html

@@ -1,6 +1,10 @@
 {% extends "authentic2_auth_msp/base.html"%}
 {% load staticfiles %}
 
+{% block content_header %}
+  <div id='single-title'>Gestion des liaisons avec mon.service-public.fr</div>
+{% endblock %}
+
 {% block content %}
 		<div class="msp">
 			<div class="cadre">