Update CHANGES.md.

Author: bagnell

CHANGES.md

@@ -46,7 +46,7 @@ Change Log
 * Fixed `Material` so it can now take a `Resource` object as an image. [#6199](https://github.com/AnalyticalGraphicsInc/cesium/issues/6199)
 * Fixed an issue causing the Bing Maps key to be sent unnecessarily with every tile request. [#6250](https://github.com/AnalyticalGraphicsInc/cesium/pull/6250)
 * Fixed documentation issue for the `Cesium.Math` class. [#6233](https://github.com/AnalyticalGraphicsInc/cesium/issues/6233)
-* Fix Firefox WebGL console warnings. [#5912](https://github.com/AnalyticalGraphicsInc/cesium/issues/5912)
+* Fixed rendering 3D Tiles as classification volumes. [#6295](https://github.com/AnalyticalGraphicsInc/cesium/pull/6295)
 
 ### 1.42.1 - 2018-02-01
 _This is an npm-only release to fix an issue with using Cesium in Node.js.__