[css-content-3] Fix markup

Author: fantasai

css-content-3/Overview.bs

@@ -5,8 +5,8 @@ Work Status: Exploring
 Shortname: css-content
 Level: 3
 Group: csswg
-TR: https://www.w3.org/TR/css3-content/
-ED: https://drafts.csswg.org/css-content/
+TR: https://www.w3.org/TR/css-content-3/
+ED: https://drafts.csswg.org/css-content-3/
 Previous Version: https://www.w3.org/TR/2016/WD-css-content-3-20160602/
 Editor: Elika J. Etemad / fantasai, W3C Invited Expert, http://fantasai.inkedblade.net/contact, w3cid 35400
 Editor: Dave Cramer, Hachette Livre, dauwhe@gmail.com, w3cid 65283
@@ -1313,7 +1313,7 @@ bookmark-state</h3>
 
 <h2 id="changes">Changes since the 2 June 2016 Working Draft</h2>
 
-	Significant changes since the <a href="https://www.w3.org/TR/2016/WD-css-content-3-20160602/2 June 2016 Working Draft</a>
+	Significant changes since the <a href="https://www.w3.org/TR/2016/WD-css-content-3-20160602/">2 June 2016 Working Draft</a>
 	consist primarily of:
 
 	<ul>