css-view-transitions-2: update visibility vs opacity wording (#13397)

Author: vmpstr

css-view-transitions-2/Overview.bs

@@ -1320,7 +1320,7 @@ ISSUE: `::view-transition-group-children()` needs to be specified here.
 	the boxes generated by any element in that {{Document}} with [=captured in a view transition=]
 	and its [=element contents=],
 	except [=ViewTransition/transition root pseudo-element=]'s [=tree/inclusive descendants=],
-	are not painted (as if they had ''visibility: hidden'') and
+	are not painted (as if they had ''opacity: 0'') and
 	do not respond to hit-testing (as if they had ''pointer-events: none'').
 
 	Note: Elements participating in a transition need to skip painting in their DOM location because
@@ -3463,6 +3463,7 @@ This appendix is <em>informative</em>.
 Changes from <a href="https://www.w3.org/TR/2024/WD-css-view-transitions-2-20240516/">2024-05-16 Working Draft</a>
 </h3>
 
+* Update wording to use `opacity: 0` instead of `visibility: hidden`. See <a href="https://github.com/w3c/csswg-drafts/issues/12629">issue 12629</a>.
 * Replace `contain: view-transition` with `view-transition-scope` property (<a href="https://github.com/w3c/csswg-drafts/issues/13123">pending #13123</a>)
 * Reorder sections, editorial changes, added several issues, updated scoped view transition wording.
 * Add waitUntil() (<a href="https://github.com/w3c/csswg-drafts/issues/9901">#9901</a>)