Fix typo

src/Materials/standardMaterial.ts

@@ -1117,7 +1117,7 @@ export class StandardMaterial extends PushMaterial {
 
             var shaderName = "default";
 
-            var uniforms = ["world", "view", "viewProjection", "vEyePosition", "vLightsType", "vAmbientColor", "vDiffuseColor", "vSpecularColor", "vEmissiveColor", "visiblity",
+            var uniforms = ["world", "view", "viewProjection", "vEyePosition", "vLightsType", "vAmbientColor", "vDiffuseColor", "vSpecularColor", "vEmissiveColor", "visibility",
                 "vFogInfos", "vFogColor", "pointSize",
                 "vDiffuseInfos", "vAmbientInfos", "vOpacityInfos", "vReflectionInfos", "vEmissiveInfos", "vSpecularInfos", "vBumpInfos", "vLightmapInfos", "vRefractionInfos",
                 "mBones",