Update config.json

States should be written in capital

Tools/Gulp/config.json

@@ -22,8 +22,8 @@
       "../../src/Tools/babylon.smartArray.js",
       "../../src/Tools/babylon.smartCollection.js",
       "../../src/Tools/babylon.tools.js",      
-      "../../src/states/babylon.alphaCullingState.js",
-      "../../src/states/babylon.depthCullingState.js",
+      "../../src/States/babylon.alphaCullingState.js",
+      "../../src/States/babylon.depthCullingState.js",
       "../../src/babylon.engine.js",
       "../../src/babylon.node.js",
       "../../src/Tools/babylon.filesInput.js",