Changed `stencilBufer` to `stencilBuffer` in `examples/webgl_shading_physical.html`.

examples/webgl_shading_physical.html

@@ -391,7 +391,7 @@
 
 				renderer.autoClear = false;
 
-				renderTargetParameters = { minFilter: THREE.LinearFilter, magFilter: THREE.LinearFilter, format: THREE.RGBFormat, stencilBufer: false };
+				renderTargetParameters = { minFilter: THREE.LinearFilter, magFilter: THREE.LinearFilter, format: THREE.RGBFormat, stencilBuffer: false };
 				renderTarget = new THREE.WebGLRenderTarget( SCREEN_WIDTH, SCREEN_HEIGHT, renderTargetParameters );
 
 				effectFXAA = new THREE.ShaderPass( THREE.ShaderExtras[ "fxaa" ] );