[css-contain-2] Fix broken reference to HTML

Author: frivoal

css-contain-2/Overview.bs

@@ -1573,10 +1573,10 @@ Restrictions and Clarifications {#cv-notes}
 	after the requestAnimationFrame callbacks
 	of the frame that renders the effects of the change
 	have run.
-	Specifically, such changes will take effect between steps 12 and 13
+	Specifically, such changes will take effect between steps 13 and 14
 	of <a href="https://html.spec.whatwg.org/multipage/webappapis.html#update-the-rendering">Update the Rendering</a> step of the Processing Model
-	(between [=run the animation frame callbacks=]
-	and [=run the update intersection observations steps=]).
+	(between “run the animation frame callbacks”
+	 and “run the update intersection observations steps”).
 
 	<div class=note>
 		Determining the viewport intersection of the element