docs/website/news.html: add 2018.02 announcement link

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

docs/website/news.html

@@ -20,7 +20,8 @@
 	<p>The stable 2018.02 release is out - Thanks to everyone
 	  contributing and testing the release candidates. See the
 	  <a href="http://git.buildroot.net/buildroot/plain/CHANGES?id=2018.02">CHANGES</a>
-	  file for more details
+	  file for more details, read the
+	  <a href="http://lists.busybox.net/pipermail/buildroot/2018-March/215002.html">announcement</a>
 	  and go to the <a href="/downloads/">downloads page</a> to pick up the
 	  <a href="/downloads/buildroot-2018.02.tar.bz2">2018.02 release</a>.</p>