[scroll-animations-1] Make 'view-timeline-inset: auto' the initial value w3c#7747

Author: fantasai

scroll-animations-1/Overview.bs

@@ -664,7 +664,7 @@ spec: cssom-view-1; type: dfn;
 	<pre class='propdef'>
 	Name: view-timeline-inset
 	Value: [ [ auto | <<length-percentage>> ]{1,2} ]#
-	Initial: 0
+	Initial: auto
 	Applies to: all elements
 	Inherited: no
 	Percentages: relative to the corresponding dimension of the relevant scrollport