(dummy) pii label statement in authz rule creation

src/authentic2/templates/authentic2/create_authorization_rule.html

@@ -12,6 +12,7 @@
 {% endblock %}
 
 {% block content %}
+  Authorization rule for <b>email address</b>.
   <form enctype="multipart/form-data" method="post">
 
     {% csrf_token %}