Update CHANGELOG-v3.50.md

Author: photonstorm

CHANGELOG-v3.50.md

@@ -17,6 +17,7 @@
 * Fixed the cause of `Uncaught TypeError: Cannot read property 'getIndex' of null` by checking the display list property securely. Fix #5489 (thanks @actionmoon)
 * Fixed an issue where adding input-enabled Game Objects to a Layer would have the input system ignore their depth settings. Fix #5483 (thanks @pr4xx)
 * The method `TilemapLayer.weightedRandomize` has changed so that the parameter `weightedIndexes` is now first in the method and is non-optional. Previously, it was the 5th parameter and incorrectly flagged as optional. This change was made to the docs but not the parameters, but now works according to the docs (thanks Fantasix)
+* The Mesh `GenerateVerts` function was returning an object with the property `verts` instead of `vertices` as expected by the `Mesh.addVertices` method. It now returns the correct name (thanks @lackhand)
 
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