ref-manual: Updated the sections pointing to the YP Release Notes.

The method for accessing the YP Release Notes for YP 2.5 forward
is to go to the "DOWNLOADS" page of the main YP website and then
click on the "RELEASE INFORMATION" button.  No longer does a user
need a simple URL.  I updated the two spots in manual where this
information existed for accessing Release Notes.

(From yocto-docs rev: 1e171d3add1048fb81c5a05a11c8ddbaf88e0ecd)

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

documentation/ref-manual/ref-variables.xml

@@ -14788,10 +14788,14 @@ recipes-graphics/xorg-font/font-alias_1.0.3.bb:PR = "${INC_PR}.3"
                         default toolchain.
                         Using older or newer versions of these components
                         might cause build problems.
-                        See the
-                        <ulink url='&YOCTO_RELEASE_NOTES;'>Release Notes</ulink>
+                        See the Release Notes for the Yocto Project release
                         for the specific components with which the toolchain
                         must be compatible.
+                        To access the Release Notes, go to the
+                        <ulink url='&YOCTO_HOME_URL;/software-overview/downloads/'>Downloads</ulink>
+                        page on the Yocto Project website and click on the
+                        "RELEASE INFORMATION" link for the appropriate
+                        release.
                     </note>
                 </para>
 

documentation/ref-manual/resources.xml

@@ -260,11 +260,13 @@
                 A list of commonly asked questions and their answers.
                 </para></listitem>
             <listitem><para>
-                <emphasis>
-                <ulink url='&YOCTO_RELEASE_NOTES;'>Release Notes</ulink>:
-                </emphasis>
+                <emphasis>Release Notes:</emphasis>
                 Features, updates and known issues for the current
                 release of the Yocto Project.
+                To access the Release Notes, go to the
+                <ulink url='&YOCTO_HOME_URL;/software-overview/downloads/'>Downloads</ulink>
+                page on the Yocto Project website and click on the
+                "RELEASE INFORMATION" link for the appropriate release.
                 </para></listitem>
             <listitem><para>
                 <emphasis>