Update CHANGELOG.md

Author: photonstorm

CHANGELOG.md

@@ -273,6 +273,7 @@ The way in which Game Objects add themselves to the Scene Update List has change
 * `Tween.seek` will no longer issue a console warning for `'Tween.seek duration too long'`, it's now up to you to check on the performance of tween seeking.
 * `WebGLRenderer.previousPipeline` is a new property that is set during a call to `clearPipeline` and used during calls to `rebindPipeline`, allowing the renderer to rebind any previous pipeline, not just the Multi Pipeline.
 * The `WebGLRenderer.rebindPipeline` method has been changed slightly. Previously, you had to specify the `pipelineInstance`, but this is now optional. If you don't, it will use the new `previousPipeline` property instead. If not set, or none given, it will now return without throwing gl errors as well.
+* If `inputWindowEvents` is set in the Game Config, then the `MouseManager` will now listen for the events on `window.top` instead of just `window`, which should help in situations where the pointer is released outside of an embedded iframe. Fix #4824 (thanks @rexrainbow)
 
 ### Bug Fixes