[scroll-animations-1] Allow 'none' as part of the value list. w3c#8843

Author: fantasai

scroll-animations-1/Overview.bs

@@ -336,7 +336,7 @@ spec: cssom-view-1; type: dfn;
 
 	<pre class='propdef'>
 	Name: scroll-timeline-name
-	Value: none | <<dashed-ident>>#
+	Value: [ none | <<dashed-ident>> ]#
 	Initial: none
 	Applies to: all elements
 	Inherited: no
@@ -671,7 +671,7 @@ spec: cssom-view-1; type: dfn;
 
 	<pre class='propdef'>
 	Name: view-timeline-name
-	Value: none | <<dashed-ident>>#
+	Value: [ none | <<dashed-ident>> ]#
 	Initial: none
 	Applies to: all elements
 	Inherited: no
@@ -1250,5 +1250,9 @@ spec: cssom-view-1; type: dfn;
 		Progress on an individual animation can now be retrieved using <code>Animation.progress</code>
 		(<a href="https://github.com/w3c/csswg-drafts/issues/8799">Issue 8799</a>)
 		and other use cases are deferred to Level 2.
+	* Allow ''scroll-timeline-name/none'' to be used as part of the value list
+		for 'scroll-timeline-name' and 'view-timeline-name',
+		not just as an alternative to it.
+		(<a href="https://github.com/w3c/csswg-drafts/issues/8843">Issue 8843</a>)
 
 	See also <a href="https://www.w3.org/TR/2023/WD-scroll-animations-1-20230428/#changes">Earlier Changes</a>.