Update How-to-dispose-of-objects.html

docs/manual/en/introduction/How-to-dispose-of-objects.html

@@ -80,7 +80,7 @@
 
 	<p>
 		Yes. It's possible to evaluate [page:WebGLRenderer.info], a special property of the renderer with a series of statistical information about the graphics board memory
-		and the rendering process. Among other things, it tells you have many textures, geometries and shader programs are internally stored. If you notice performance problems
+		and the rendering process. Among other things, it tells you how many textures, geometries and shader programs are internally stored. If you notice performance problems
 		in your application, it's a good idea to debug this property in order to easily identify a memory leak.
 	</p>