[css-text] Bikeshed fix

Author: frivoal

css-text-3/Overview.bs

@@ -28,6 +28,7 @@ WPT Path Prefix: /css/css-text/
 <pre class=link-defaults>
 spec:css2; type:dfn; text:document language
 spec:css-ruby-1; type:dfn; text:ruby
+spec:css-backgrounds-3; type:property; text:border
 </pre>
 
 <style type="text/css">

css-text-4/Overview.bs

@@ -24,6 +24,7 @@ spec:selectors-4; type:selector; text::lang()
 spec:css2; type:dfn; text:document language
 spec:css-ruby-1; type:dfn; text:ruby
 spec:selectors-4; type:dfn; text:selector
+spec:css-backgrounds-3; type:property; text:border
 </pre>
 
 <pre class=biblio>