[selectors-4] Fix links

Author: fantasai

selectors-4/Overview.bs

@@ -29,7 +29,7 @@ Ignored Terms: function token, Document, DocumentFragment, math, h1, shadow tree
 Ignored Vars: identifier, extended filtering, i
 </pre>
 <pre class=link-defaults>
-spec:css-syntax-3; type:dfn; text:identifier
+spec:css-values-4; type:dfn; text:identifier
 spec:css-display-3; type:property; text:display
 spec:css-pseudo-4; type:selector;
 	text: ::before
@@ -896,7 +896,7 @@ Sub-pseudo-elements</h4>
 	which are defined as the <dfn export lt="sub-pseudo-element">sub-pseudo-elements</dfn>
 	of this <dfn export>originating pseudo-element</dfn>.
 	For example,
-	when ''::before'' is given a ''list-item'' [=display type=],
+	when ''::before'' is given a ''display/list-item'' [=display type=],
 	it becomes the [=originating pseudo-element=]
 	of its ''::before::marker'' [=sub-pseudo-element=].