[mediaqueries-3] Update description of CR2->PR2

Author: frivoal

mediaqueries-3/Overview.html

@@ -606,8 +606,8 @@ <h3 id=error-handling><span class=secno>3.1. </span>Error Handling</h3>
   <p>For media queries that are not conforming user agents need to follow the
    rules described in this section.
 
-  <div class="correction" id="c2">
-   <span class="marker">Candidate Correction 2:</span>
+  <div class="correction proposed" id="c2">
+   <span class="marker">Proposed Correction 2:</span>
    Require that ‘<code>layer</code>’ is also to not be treated as an unknown media type,
    but as a syntax errors when used in place of media types.