[css-color-4][editorial] linkfix

Author: svgeesus

css-color-4/Overview.bs

@@ -27,8 +27,8 @@ WPT Display: open
 </pre>
 
 <pre class="link-defaults">
-spec: css22; type: dfn; text: stacking context
-spec: css22; type:property; text:z-index
+spec: css2; type: dfn; text: stacking context
+spec: css2; type:property; text:z-index
 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