dispatcher: docs - removed extra <section> tag

src/modules/dispatcher/doc/dispatcher_admin.xml

@@ -1808,7 +1808,6 @@ onreply_route {
 ...
 </programlisting>
     </section>
-	<section>
 	<section id="dispatcher.r.set_duid_state">
 		<title>
 		<function moreinfo="none">dispatcher.set_duid_state</function>