documentation/dev-manual/dev-manual-newbie.xml: updated download link

Found a link that was still yoctoproject.org/downloads.  I changed
to downloads.yoctoproject.org.

(From yocto-docs rev: 26c87f543c95efcd7e5a546b3cd0d0756a238fa5)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/dev-manual/dev-manual-newbie.xml

@@ -115,7 +115,7 @@
                 This page on the Yocto Project website allows you to download any Yocto Project
                 release or Board Support Package (BSP) in tarball form.
                 The tarballs are similar to those found in the 
-                <ulink url='http://www.yoctoproject.org/downloads/'>Index of /downloads:</ulink> area.</para>
+                <ulink url='http://downloads.yoctoproject.org/releases/'>Index of /releases:</ulink> area.</para>
                 <para>
                 <imagedata fileref="figures/yp-download.png" align="center" width="6in" depth="4in" />
             </para></listitem>