[css-nesting-1][editorial] @container is now a conditional group rule (#10561)

Author: cdoublev

css-nesting-1/Overview.bs

@@ -641,10 +641,9 @@ Nesting Other At-Rules {#conditionals}
 	<div class=note>
 		Specifically, these rules are capable of being [=nested group rules=]:
 
-		* all the [=conditional group rules=] (''@media'', ''@supports'')
+		* all the [=conditional group rules=] (''@container'', ''@media'', ''@supports'')
 		* ''@layer''
 		* ''@scope''
-		* ''@container''
 	</div>
 
 	The meanings and behavior of such [=nested group rules=]
@@ -1367,4 +1366,4 @@ Significant changes since the
 	(<a href="https://github.com/w3c/csswg-drafts/issues/8738">Issue 8738</a>)
 
 * Replaced <code>@nest</code> with [=nested declarations rules=].
-	(<a href="https://github.com/w3c/csswg-drafts/issues/10234">Issue 10234</a>)
+	(<a href="https://github.com/w3c/csswg-drafts/issues/10234">Issue 10234</a>)