fix attr (#26895)

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

@@ -105,8 +105,8 @@
 
 		<code>
 		&lt;!DOCTYPE html&gt;
-		&lt;html&gt;
-			&lt;head lang="en"&gt;
+		&lt;html lang="en"&gt;
+			&lt;head&gt;
 				&lt;meta charset="utf-8"&gt;
 				&lt;title&gt;My first three.js app&lt;/title&gt;
 				&lt;style&gt;