[css-flexbox-1] Note to self

Replaced vs non-replaced elements with aspect ratio differ here on purpose.

Author: fantasai

css-flexbox-1/Overview.bs

@@ -983,6 +983,7 @@ Automatic Minimum Size of Flex Items</h3>
 	if its [=specified size suggestion=] exists;
 	otherwise, the smaller of its [=transferred size suggestion=] and its [=content size suggestion=]
 	if the element is [=replaced element|replaced=]
+	<!-- https://github.com/w3c/csswg-drafts/issues/6069 -->
 	and its [=transferred size suggestion=] exists;
 	otherwise its [=content size suggestion=].
 	In all cases, the size is clamped by the [=maximum size|maximum=] [=main size=] if it's <a>definite</a>.