[Security] Add some missing CHANGELOG entries

Author: chalasr

CHANGELOG.md

@@ -5,6 +5,8 @@ CHANGELOG
 -----
 
  * Added `FirewallListenerFactoryInterface`, which can be implemented by security factories to add firewall listeners
+ * Added `SortFirewallListenersPass` to make the execution order of firewall listeners configurable by
+   leveraging `Symfony\Component\Security\Http\Firewall\FirewallListenerInterface`
 
 5.1.0
 -----