[mediaqueries-5] Bikeshed tweak

Author: frivoal

mediaqueries-5/Overview.bs

@@ -22,6 +22,7 @@ At Risk: The '@media/update' media feature
 
 <pre class=link-defaults>
 spec:css-conditional-3; type:at-rule; text:@media
+spec:css-values-4; type:type; text:<ratio>
 spec:css-values-4; type:type; text:<integer>
 spec:css-values-4; type:type; text:<length>
 spec:css-values-4; type:type; text:<number>