[cssmediaqueries] Update the Changes section

Author: frivoal

mediaqueries/Overview.html

@@ -1408,6 +1408,10 @@ <h3 id=changes-2012><span class=secno>5.1. </span>Changes Since the Media
 
    <li>The <a href="#luminosity">‘<code class=css>luminosity</code>’
     media feature</a> was added.
+
+   <li>‘<code class=css>or</code>’, ‘<code class=css>and</code>’,
+    ‘<code class=css>only</code>’ and ‘<code class=css>not</code>’
+    are invalid media types.
   </ul>
 
   <h2 id=conformance><span class=secno>6. </span> Conformance</h2>

mediaqueries/Overview.src.html

@@ -1170,6 +1170,7 @@ <h3 id="changes-2012">Changes Since the Media Queries Level 3</h3>
 	<li>The <a href="#pointer">''pointer'' media feature</a> was added.
 	<li>The <a href="#hover">''hover'' media feature</a> was added.
 	<li>The <a href="#luminosity">''luminosity'' media feature</a> was added.
+	<li>''or'', ''and'', ''only'' and ''not'' are invalid media types.
 </ul>
 
 <h2 id="conformance">