[scroll-animations-1] Add animation-range-* to coordinating list property group (#11682)

Author: cdoublev

scroll-animations-1/Overview.bs

@@ -1053,6 +1053,10 @@ spec:selectors-4; type:dfn; text:selector
 	The 'animation-range' properties
 	are [=reset-only sub-properties=] of the 'animation' [=shorthand=].
 
+	These list-valued properties
+	form a [=coordinating list property group=]
+	with 'animation-name' as the [=coordinating list base property=].
+
 	ISSUE: Define application to time-driven animations.
 
 ### Specifying an Animation’s Timeline Range: the 'animation-range' shorthand ### {#animation-range}