Update v2.0.0.md

Author: ryanflorence

upgrade-guides/v2.0.0.md

@@ -166,7 +166,7 @@ const RouteComponent = React.createClass({
 
 You don't need to manually tear down the route leave hook in most cases. We automatically remove all attached route leave hooks after leaving the associated route.
 
-## Links `to` Type
+## `<Link to>` and `isActive` take location descriptors
 
 `<Link to>` can now take a location descriptor in addition to strings. The `query` and `state` props are deprecated.