Update CSS 2.1 previous version link.

Author: dbaron

css3-conditional/Overview.html

@@ -34,7 +34,7 @@ <h2 class="no-num no-toc" id=longstatus-date>Editor's Draft 7 June 2011</h2>
     <dt>Previous version:
 
     <dd><a
-     href="http://www.w3.org/TR/2011/REC-CSS2-2011MMDD/">http://www.w3.org/TR/2011/REC-CSS2-2011MMDD/</a>
+     href="http://www.w3.org/TR/2011/REC-CSS2-20110607/">http://www.w3.org/TR/2011/REC-CSS2-20110607/</a>
      (for &lsquo;<code class=css>@media</code>&rsquo;)
 
     <dd><a

css3-conditional/Overview.src.html

@@ -24,7 +24,7 @@ <h2 class="no-num no-toc">[LONGSTATUS] [DATE]</h2>
     <dd><a href="http://www.w3.org/TR/css3-conditional">http://www.w3.org/TR/css3-conditional</a>
 
   <dt>Previous version:
-    <dd><a href="http://www.w3.org/TR/2011/REC-CSS2-2011MMDD/">http://www.w3.org/TR/2011/REC-CSS2-2011MMDD/</a> (for '@media')</dd>
+    <dd><a href="http://www.w3.org/TR/2011/REC-CSS2-20110607/">http://www.w3.org/TR/2011/REC-CSS2-20110607/</a> (for '@media')</dd>
     <dd><a href="http://lists.w3.org/Archives/Public/www-style/2011Apr/0428.html">http://lists.w3.org/Archives/Public/www-style/2011Apr/0428.html</a> (for '@supports')</dd>
     <dd><a href="http://lists.w3.org/Archives/Public/www-style/2004Aug/0135.html">http://lists.w3.org/Archives/Public/www-style/2004Aug/0135.html</a> (for '@document')</dd>