[unity] Added changelog 4.1 entry of previous 4.0 commit.

CHANGELOG.md

@@ -51,6 +51,7 @@
 * **Additions**
   * `BoneFollower` and `BoneFollowerGraphic` now provide an additional `Follow Parent World Scale` parameter to allow following simple scale of parent bones (rotated/skewed scale can't be supported). 
   * `SpineAtlasAsset.CreateRuntimeInstance` methods now provide an optional `newCustomTextureLoader` parameter (defaults to `null`) which can be set to e.g. `(a) => new YourCustomTextureLoader(a)` to use your own `TextureLoader` subclass instead of `MaterialsTextureLoader`.
+  * Improved `Advanced - Fix Prefab Override MeshFilter` property for `SkeletonRenderer` (and subclasses`SkeletonAnimation` and `SkeletonMecanim`), now providing an additional option to use a global value which can be set in `Edit - Preferences - Spine`.
 
 * **Changes of default values**