Add CHANGELOG for #247

Author: Xerkus

CHANGELOG.md

@@ -18,7 +18,9 @@ All notable changes to this project will be documented in this file, in reverse
 
 ### Fixed
 
-- Nothing.
+- [#247](https://github.com/zendframework/zend-mvc/pull/247) fixes bug in
+  controller plugin Forward, introduced in 2.1.0, where problem listeners were
+  not detached for forwarded controller dispatch
 
 ## 3.1.0 - 2017-05-01