Clarify the explanation (#9422)

First usage of `updateStyle` with now indication of what or where it came from.

docs/manual/introduction/Creating-a-scene.html

@@ -61,7 +61,7 @@
 
 		<div>In addition to creating the renderer instance, we also need to set the size at which we want it to render our app. It's a good idea to use the width and height of the area we want to fill with our app - in this case, the width and height of the browser window. For performance intensive apps, you can also give <strong>setSize</strong> smaller values, like <strong>window.innerWidth/2</strong> and <strong>window.innerHeight/2</strong>, which will make the app render at half size.</div>
 
-		<div>If you wish to keep the size of your app but render it at a lower resolution, you can do so by calling <strong>setSize</strong> with false as <strong>updateStyle</strong>. For example, <strong>setSize(window.innerWidth/2, window.innerHeight/2, false)</strong> will render your app at half resolution, given that your &lt;canvas&gt; has 100% width and height.</div>
+		<div>If you wish to keep the size of your app but render it at a lower resolution, you can do so by calling <strong>setSize</strong> with false as <strong>updateStyle</strong> (the third arugment). For example, <strong>setSize(window.innerWidth/2, window.innerHeight/2, false)</strong> will render your app at half resolution, given that your &lt;canvas&gt; has 100% width and height.</div>
 
 		<div>Last but not least, we add the <strong>renderer</strong> element to our HTML document. This is a &lt;canvas&gt; element the renderer uses to display the scene to us.</div>