Update CHANGELOG with info for #3647

Author: EmandM

com.unity.netcode.gameobjects/CHANGELOG.md

@@ -12,6 +12,7 @@ Additional documentation and release notes are available at [Multiplayer Documen
 
 - Clicking on the Help icon in the inspector will now redirect to the relevant documentation. (#3663)
 - Added a `Set` function onto `NetworkList` that takes an optional parameter that forces an update to be processed even if the current value is equal to the previous value. (#3690)
+- `NetworkSceneManager` as an internal wrapper for the `SceneManager.Scene.handle` and swapped all places that use an `int` to represent a `Scene.handle` to instead use the `NetworkSceneManager`. (#3647)
 
 ### Changed
 
@@ -28,6 +29,7 @@ Additional documentation and release notes are available at [Multiplayer Documen
 
 - Multiple disconnect events from the same transport will no longer disconnect the host. (#3707)
 - Made a variety of small performance improvements. (#3683)
+- Distributed authority clients no longer send themselves in the `ClientIds` list when sending a `ChangeOwnershipMessage`. (#3687)
 
 ### Security