doc: adjust changelog to clarify client revert

PR-URL: nodejs/node#1859
Reviewed-By: Brendan Ashworth <brendan.ashworth@me.com>
Reviewed-By: Michaël Zasso <mic.besace@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>

CHANGELOG.md

@@ -4,7 +4,7 @@
 
 ### Notable changes
 
-* **http**: reverts the removal of an undocumented `client` property on client connections, this property is being used in the wild, most notably by [request](https://github.com/request/request) which is used by npm. (Michaël Zasso) [#1852](https://github.com/nodejs/io.js/pull/1852).
+* **http**: Reverts the move of the `client` property of `IncomingMessage` to its prototype. Although undocumented, this property was used and assumed to be an "own property" in the wild, most notably by [request](https://github.com/request/request) which is used by npm. (Michaël Zasso) [#1852](https://github.com/nodejs/io.js/pull/1852).
 
 ### Known issues