Fix date.

whatsnew.htm

@@ -26,7 +26,7 @@ Portions Copyright &copy; 2000-2012 Martijn Laan. All rights reserved.<br />
 For conditions of distribution and use, see <a href="http://www.jrsoftware.org/files/is/license.txt">LICENSE.TXT</a>.
 </p>
 
-<p><a name="5.5.1"></a><span class="ver">5.5.1 </span><span class="date">(2012-06-14)</span></p>
+<p><a name="5.5.1"></a><span class="ver">5.5.1 </span><span class="date">(2012-07-09)</span></p>
 <ul>
 <li>Added official Greek translation.</li>
 <li>Updated the official Catalan, Czech, Danish, Finnish, French (Standard), German, Hebrew, Hungarian, Italian, Japanese, Norwegian (Bokmal), Polish, Portuguese (Brazil), Portuguese (Portugal), Russian, Serbian (Cyrillic), Serbian (Latin), Slovenian, Spanish, and Ukrainian translations for the changes introduced by the previous version.</li>