Adds changelog message for fixing bug 785299.

resources/install/debian/changelog.tmpl

@@ -4,6 +4,8 @@ _PACKAGE_NAME_ (_VERSION_) unstable; urgency=low
   * Adjust build-time deps for easier backporting. (Closes: #729904)
   * Reuses already installed on the system spellcheck
     ditionaries. (Closes: #719201)
+  * Fixes processing incoming xmpp ping error packets and showing
+    many stack traces in console. (Closes: #785299)
   * Removes java6-runtime alternative. (Closes: #735904)
 
  -- Damian Minkov <damencho@jitsi.org>  _DATE_