[css-color-4][editorial] link defaults to avoid linking to RDF by accident

Author: svgeesus

css-color-4/Overview.bs

@@ -29,6 +29,7 @@ WPT Display: open
 <pre class="link-defaults">
 spec: css2; type: dfn; text: stacking context
 spec: css2; type:property; text:z-index
+spec:infra; type:dfn; text:string
 spec: css-cascade-5; type:dfn; text:used value
 spec: css-cascade-5; type:dfn; text:computed value
 spec: css-cascade-5; type:dfn; text:specified value