[css-ui-4] Rework example

The SVG cursor element has been deprecated, so using it in an example is
a bad idea.

Author: frivoal

css-ui-4/Overview.bs

@@ -1022,20 +1022,20 @@ Styling the Cursor: the 'cursor' property</h4>
 		Here is an example of using several cursor values.
 		<pre><code class="lang-css">
 		:link,:visited {
-			cursor: url(example.svg#linkcursor),
+			cursor: url(example.svg),
 				url(hyper.cur),
 				url(hyper.png) 2 3,
 				pointer
 		}
 		</code></pre>
 
 		This example sets the cursor on all hyperlinks (whether visited or not)
-		to an external SVG <{cursor}>.
-		User agents that don't support SVG cursors would simply skip
+		to an external SVG image to be used as a cursor.
+		If that fails to load, user agents  would simply skip
 		to the next value and attempt to use the "hyper.cur" cursor.
 		If that cursor format was also not supported,
 		the UA could attempt to use the "hyper.png" cursor with the explicit hotspot.
-		Finally if the UA does not support any of those image cursor formats, the UA would skip to the last value
+		Finally if the UA cannot load any of those image cursors, the UA would skip to the last value
 		and render the ''pointer'' cursor.
 	</div>