[scroll-animations-1] Cross-reference issue w3c#7759

Author: fantasai

scroll-animations-1/Overview.bs

@@ -764,6 +764,8 @@ spec: cssom-view-1; type: dfn;
 	In case of a name conflict on the same element,
 	[=scroll progress timelines=] take precedence over [=view progress timelines=].
 
+	ISSUE(7759): We plan to add functionality to expand the scope.
+
 ## Animation Events ## {#events}
 
 	[=Scroll-driven animations=] dispatch all the same animation events