Updating config.json occlusionRenderer to match file case

match file babylon.occlusionBoundingBoxRenderer case in the config.json

Tools/Gulp/config.json

@@ -81,7 +81,7 @@
                 "../../src/Mesh/babylon.geometry.js",
                 "../../src/PostProcess/babylon.postProcessManager.js",
                 "../../src/Tools/babylon.performanceMonitor.js",
-                "../../src/Rendering/babylon.OcclusionBoundingBoxRenderer.js"
+                "../../src/Rendering/babylon.occlusionBoundingBoxRenderer.js"
             ]
         },         
         "particles" :