[css-anchor-position-1] Clarify anchors-visible is after ResizeObservers also w3c#12732

Author: fantasai

css-anchor-position-1/Overview.bs

@@ -2229,8 +2229,10 @@ depending on some commonly needed layout conditions.
 	Whether or not |anchor| is [=clipped by intervening boxes=]
 	must be checked after [=updating content relevancy for a document=]
 	(see 'content-visibility' in [[css-contain-2]])
-	and before running any {{IntersectionObserver}},
-	and may also be checked at other times to improve responsiveness.
+	and running any {{ResizeObserver}},
+	but before running any {{IntersectionObserver}}.
+	It may also be checked at other times to improve responsiveness.
+	<!-- See https://github.com/w3c/csswg-drafts/issues/12732#issuecomment-3494097561 -->
 
 	Note: This means that if an abspos is next to its anchor in the DOM,
 	for example,