Fixes typo in Tutorial DOM Events - issue #4023

Fixes https://github.com/sveltejs/svelte/issues/4023

Typo in tutorial. Should be "mouseover" instead of "mouseove"

Testing:
- works in browser with correction

site/content/tutorial/05-events/01-dom-events/text.md

@@ -5,7 +5,7 @@ title: DOM events
 As we've briefly seen already, you can listen to any event on an element with the `on:` directive:
 
 ```html
-<div on:mousemove={handleMousemove}>
+<div on:mousemover={handleMousemove}>
 	The mouse position is {m.x} x {m.y}
 </div>
 ```