Bikeshed fix

Author: frivoal

mediaqueries/Overview.bs

@@ -19,6 +19,7 @@ Abstract:
 Abstract: Media Queries Level 4 describes the mechanism and syntax of media queries, media types, and media features. It extends and supersedes the features defined in Media Queries Level 3.
 Ignored Terms: min-resolution, max-resolution, none, view-mode, mediaText, DOMString
 Link Defaults: css-break-3 (property) break-inside
+Link Defaults: css-cascade-3 (at-rule) @import
 </pre>
 
 <pre class=link-defaults>