[css-contain-2] Update terminology

07db605 changed the term "involved in a
view transition" to "captured in a view transition". Update accordingly.

Author: frivoal

css-contain-2/Overview.bs

@@ -1780,7 +1780,7 @@ Suppressing An Element's Contents Entirely: the 'content-visibility' property {#
 			content-visibility/content-visibility-with-top-layer-006.html
 			</wpt>
 
-		* The element has a [=flat tree=] descendant that is [=involved in a view transition=].
+		* The element has a [=flat tree=] descendant that is [=captured in a view transition=].
 
 	</div>