[css-overflow-5] Temporarily go with :target-current. w3c#10918

Author: tabatkins

css-overflow-5/Overview.bs

@@ -263,16 +263,17 @@ The 'scroll-marker-group' property</h4>
 	or via the tab key when currently active or when no other ''::scroll-marker'' is active and this is the first marker in the group,
 	ensuring the group has a <a href="https://open-ui.org/components/focusgroup.explainer/#guaranteed-tab-stop">guaranteed tab stop</a>.
 
-<h4 id="active-scroll-marker">The active scroll marker</h4>
+<h4 id="active-scroll-marker">
+Selecting The Active Scroll Marker: the '':target-current'' pseudo-class</h4>
 
 	Exactly one [=scroll marker=] within each [=scroll marker group=] is determined to be active at a time.
-	An active [=scroll marker=] can be styled by the '':checked'' pseudo-class.
+	Such "active" [=scroll markers=] match the <dfn selector>:target-current</dfn> pseudo-class.
 
 	<div class='example'>
 		The following snippet shows how the link to the currently scrolled section can be highlighted:
 
 		<pre highlight=css>
-			a:checked {
+			a:target-current {
 				font-weight: bold;
 			}
 		</pre>