[css-2026][editorial] fix bikeshed autolink

Author: svgeesus

css-2026/Overview.bs

@@ -33,6 +33,7 @@ Boilerplate: index no
 spec:css-ui-3; type:property; text:cursor
 spec:css-ui-3; type:property; text:outline
 spec:css-display-3; type:property; text:display
+spec:css-env-1; type:function; text:env()
 spec:selectors-4;
 	type:dfn; text:document language
 	type:dfn; text:pseudo-elements