ref-manual: Chanaged a link to Wayland topic.

The Wayland and Weston topic moved from the overview-manual to the
dev-manual.  The lone link to this topic was in the ref-images
chapter.  I updated the link.

(From yocto-docs rev: 6c335f8d3618e3285f91fe20aea33a1c1f1c0ddf)

Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/ref-manual/ref-images.xml

@@ -155,8 +155,8 @@
                 This image provides the Wayland protocol libraries and the
                 reference Weston compositor.
                 For more information, see the
-                "<ulink url='&YOCTO_DOCS_OM_URL;#wayland'>Wayland</ulink>"
-                section in the Yocto Project Overview and Concepts Manual.
+                "<ulink url='&YOCTO_DOCS_DEV_URL;#dev-using-wayland-and-weston'>Using Wayland and Weston</ulink>"
+                section in the Yocto Project Development Tasks Manual.
                 </para></listitem>
             <listitem><para><filename>core-image-x11</filename>:
                 A very basic X11 image with a terminal.