remove reference to old api

Author: ryanflorence

docs/guides/overview.md

@@ -304,8 +304,8 @@ Scrolling
 By default, the router will manage the scroll position between route
 transitions. When a user clicks "back" or "forward", it will restore
 their scroll position. If they visit a new route, it will automatically
-scroll the window to the top. You can opt out of this with the
-`preserverScrollPosition` option on [Routes][Routes] or [Route][Route].
+scroll the window to the top. You can configure this options on
+[Routes][Routes].
 
 Bells and Whistles
 ------------------