Updated CHANGES.md

CHANGES.md

@@ -33,6 +33,7 @@ Change Log
 * Added support for ordering in `DataSourceCollection` [#6316](https://github.com/AnalyticalGraphicsInc/cesium/pull/6316)
   * All ground geometry from one `DataSource` will render in front of all ground geometry from another `DataSource` in the same collection with a lower index.
   * Use `DataSourceCollection.raise`, `DataSourceCollection.lower`, `DataSourceCollection.raiseToTop` and `DataSourceCollection.lowerToBottom` functions to change the ordering of a `DataSource` in the collection.
+* Improved processing order of 3D tiles. [#6364](https://github.com/AnalyticalGraphicsInc/cesium/pull/6364)
 
 ##### Fixes :wrench:
 * Fixed support of glTF-supplied tangent vectors. [#6302](https://github.com/AnalyticalGraphicsInc/cesium/pull/6302)
@@ -44,7 +45,6 @@ Change Log
 * Fixed animation for glTF models with missing animation targets. [#6351](https://github.com/AnalyticalGraphicsInc/cesium/pull/6351)
 * Fixed double-sided flag for glTF materials with `BLEND` enabled. [#6371](https://github.com/AnalyticalGraphicsInc/cesium/pull/6371)
 
-
 ### 1.43 - 2018-03-01
 
 ##### Major Announcements :loudspeaker: