Update CHANGELOG-v3.50.md

Author: photonstorm

CHANGELOG-v3.50.md

@@ -31,6 +31,7 @@ Other pipeline changes are as follows:
 * The `WebGLPipeline.shouldFlush` method now accepts an optional parameter `amount`. If given, it will return `true` if when the amount is added to the vertex count it will exceed the vertex capacity. The Multi Pipeline has been updated to now use this method instead of performing the comparison multiple times itself.
 * The `RopePipeline` now extends `MultiPipeline` and just changes the topolgy, vastly reducing the filesize.
 * The `WebGLPipeline.flushLocked` property has been removed. A pipeline can never flush in the middle of a flush anyway, so it was just wasting CPU cycles being set.
+* You can now pass a pipeline instance to the `GameObject.setPipeline` method, as well as a string.
 
 ### Pipeline Uniform Changes