[css-conditional] Update Changes list.

Author: fantasai

css-conditional/Overview.bs

@@ -1034,14 +1034,11 @@ partial interface CSS {
 Changes</h2>
 
 <p>The following (non-editorial) changes were made to this specification since the
-<a href="https://www.w3.org/TR/2012/WD-css3-conditional-20121213/">13 December 2012 Working Draft</a>:
+<a href="https://www.w3.org/TR/2013/CR-css3-conditional-20130404/">4 April 2013 Candidate Recommendation</a>:
 
 <ul>
-  <li>Require whitespace around ''and'' and ''or'' and after ''not''.
-  <li>Add note explaining that user preferences that effectively disable a property (e.g., high-contrast mode disabling colors) do not effect the definition of support.
-  <li>Describe requirements for conditionText getter on CSSSupportsRule.
-  <li>Clarify the definition of &ldquo;literal match&rdquo; in CSS.supports().
-  <li>Specify behavior of CSSGroupingRule.insertRule when given an empty string or more than one syntactically valid rule.
+  <li>Fixed missing semicolons in IDL code.
+  <li>Updated links, terminology, and example code in response to changes to other modules.
 </ul>
 
 <h2 class=no-num id="acknowledgments">Acknowledgments</h2>