Update CHANGELOG.md

Author: photonstorm

CHANGELOG.md

@@ -11,6 +11,7 @@
 * `UpdateList.shutdown` wasn't removing the Scene Update event listener, causing actions to be multiplied on Scene restart (such as animation playback). Fix #4799 (thanks @jronn)
 * `Container.mask` wouldn't render in WebGL due to a change in the way child masks were handled. Container masking now works again as in 3.19. Fix #4803 (thanks @paulsymphony)
 * `DynamicTilemapLayer.setCollision` would cause an `indexOf` error when trying to access the layer data. Fix #4800 (thanks @PavelMishin)
+* `SceneManager.run` (and consequently `ScenePlugin.run`) was using an out-dated way of checking if a Scene was paused before trying to resume it, causing a Scene to be started again instead of resumed. It now uses the `Systems.isPaused` function instead. Fix #3931 (thanks @alexeymolchan)
 
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