Update CHANGES.md

Author: lilleyse

CHANGES.md

@@ -29,6 +29,7 @@ Change Log
 * Fixed a bug when creating billboard and model entities without a globe. [#6109](https://github.com/AnalyticalGraphicsInc/cesium/pull/6109)
 * Updated documentation links to reflect new locations on cesiumjs.org and cesium.com.
 * Added support for vertex shader uniforms when `tileset.colorBlendMode` is  `MIX` or `REPLACE`. [#5874](https://github.com/AnalyticalGraphicsInc/cesium/pull/5874)
+* Fixed applying a translucent style to a point cloud tileset. [#6113](https://github.com/AnalyticalGraphicsInc/cesium/pull/6113)
 
 ### 1.41 - 2018-01-02