news: Fix xml dump of autogenerated websocket

docs/news.xml

@@ -274,6 +274,15 @@
           for x86_64 HVM domains.
         </description>
       </change>
+      <change>
+        <summary>
+          qemu: Fix XML dump of autogenerated websocket
+        </summary>
+        <description>
+          As a result autogenerated websocket port is regenerated on domain restore,
+          migration and such as it should be.
+        </description>
+      </change>
     </section>
   </release>
   <release version="v2.5.0" date="2016-12-04">