[css-contain-2] Update changelog

Author: frivoal

css-contain-2/Overview.bs

@@ -2643,6 +2643,9 @@ Changes from <a href="https://www.w3.org/TR/2022/WD-css-contain-2-20220917/">202
 * 'content-visibility' applies to the same properties as [=size containment=] rather than [=layout containment=]
 * clarified that 'content-visibility' affects the used value, not computed value, of the 'contain' property
 * Updated the ContentVisibilityAutoStateChanged event name to ContentVisibilityAutoStateChange to follow the convention for event names.
+* Move the definition of inline-size containement from the Level 3 specification
+	to this Level 2.
+	(<a href="https://github.com/w3c/csswg-drafts/issues/10433">Issue 10433</a>)
 
 <h3 id="changes-since-2020-12-16">
 Changes from <a href="https://www.w3.org/TR/2020/WD-css-contain-2-20201216/">2020-12-16 Working Draft</a>