[css-contain-1] Link to L2 directly

Author: frivoal

css-contain-1/Overview.bs

@@ -867,7 +867,7 @@ This appendix is <em>informative</em>.
 		<span id=property-scoped></span>
 		<span id=property-scoped-to-an-element></span>
 		<span id=property-scoped-to-a-sub-tree></span>
-		Drop the at-risk “style containment” feature from this specification, move it [[CSS-CONTAIN-2]]
+		Drop the at-risk “style containment” feature from this specification, move it <a href="https://drafts.csswg.org/css-contain-2/">Level 2</a>
 
 		<wpt>
 		contain-strict-011.html