[css-position] Fix obsolete references to inset-area

Author: nt1m

css-position-3/Overview.bs

@@ -395,10 +395,10 @@ Further Adjustments to the Containing Block</h4>
 		to a specified [=grid area=].
 		See [[css-grid-1#abspos-items]].
 
-	2. The 'inset-area' and 'position-try' properties
+	2. The 'position-area' and 'position-try' properties
 		can change the [=containing block=] rectangle
-		to a specified area of an [=inset-area grid=].
-		See [[css-anchor-position-1#inset-area]].
+		to a specified area of an [=position-area grid=].
+		See [[css-anchor-position-1#position-area]].
 
 	The element's <dfn export>original containing block</dfn>
 	is its [=containing block=]