[css-position-3] Clarify that css-position-3 supersedes css-logical-1. w3c#6434

Author: fantasai

css-position-3/Overview.bs

@@ -178,6 +178,8 @@ Module Interactions</h3>
 		<a href="https://www.w3.org/TR/CSS2/visudet.html#abs-replaced-height">10.6.5 Absolutely positioned replaced elements</a>
 	</ul>
 
+	It also replaces and supersedes the 'inset*' property definitions in [[CSS-LOGICAL-1]]
+	([[CSS-LOGICAL-1#inset-properties]]).
 
 <h3 id="values">
 Value Definitions</h3>