[css-conditional-5] Clarify how container query length units are evaluated (#11566)

Author: Psychpsyo

css-conditional-5/Overview.bs

@@ -1854,8 +1854,8 @@ Container Relative Lengths: the ''cqw'', ''cqh'', ''cqi'', ''cqb'', ''cqmin'', '
 
 	For each element,
 	[=container query length=] units are evaluated
-	as [=container size queries=] on the relevant axis (or axes)
-	described by the unit.
+	using the same rules as [=container size queries=]
+	on the relevant axis (or axes) described by the unit.
 	The [=query container=] for each axis
 	is the nearest ancestor container
 	that accepts [=container size queries=] on that axis.