[scroll-animations-1] Clarify syntactic interaction of scroll()/view() and animation-timeline. w3c#7579

Author: fantasai

scroll-animations-1/Overview.bs

@@ -138,7 +138,7 @@ spec: cssom-view-1; type: dfn;
 ### The ''scroll()'' notation ### {#scroll-notation}
 
 	The <dfn>scroll()</dfn> functional notation
-	can be used as a value of 'animation-timeline'
+	can be used as a <<single-animation-timeline>> value in 'animation-timeline'
 	and specifies a [=scroll progress timeline=].
 	Its syntax is
 
@@ -421,7 +421,7 @@ spec: cssom-view-1; type: dfn;
 ### The ''view()'' notation ### {#view-notation}
 
 	The <dfn>view()</dfn> functional notation
-	can be used as a value of 'animation-timeline'
+	can be used as a <<single-animation-timeline>> value in 'animation-timeline'
 	and specifies a [=view progress timeline=]
 	in reference to the nearest ancestor [=scroll container=].
 	Its syntax is