[BrowserKit] Updated changelog.

Author: jfsimon

src/Symfony/Component/BrowserKit/CHANGELOG.md

@@ -4,5 +4,9 @@ CHANGELOG
 2.1.0
 -----
 
+ * [BR BREAK] The Symfony\Component\HttpKernel\Client::request() method
+   now returns a Symfony\Component\BrowserKit\Response instance
+   (instead of a Symfony\Component\HttpFoundation\Response instance)
+
  * [BC BREAK] The CookieJar internals have changed to allow cookies with the
    same name on different sub-domains/sub-paths