docs/news.html: add 2014.05 announcement link

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

docs/news.html

@@ -11,7 +11,8 @@
     <p>The stable 2014.05 release is out - Thanks to everyone
     contributing and testing the release candidates. See the
     <a href="http://git.buildroot.net/buildroot/plain/CHANGES?id=2014.05">CHANGES</a>
-    file for more details,
+    file for more details, read the
+    <a href="http://lists.busybox.net/pipermail/buildroot/2014-May/097863.html">announcement</a>
     and go to the <a href="/downloads/">downloads page</a> to pick up the
     <a href="/downloads/buildroot-2014.05.tar.bz2">2014.05 release</a>.</p>