Update OrbitControls.html

Very very minor typo edit.

docs/examples/controls/OrbitControls.html

@@ -57,7 +57,7 @@ function animate() {
 			[page:Camera object]: (required) The camera to be controlled.<br><br>
 
 			[page:HTMLDOMElement domElement]: (optional) The HTML element used for event listeners. By default this is the whole document,
-			however if you only want to the controls to work over a specific element (e.g. the canvas) you can specify that here.
+			however if you only want the controls to work over a specific element (e.g. the canvas) you can specify that here.
 		</p>