ref-manual: Fixed cross-reference wording in SDK_LOCAL_CONF_WHITELIST

Wording did not match that of similar SDK variables.

(From yocto-docs rev: 696eb9ff0b89222dc696adc0bd28247c0a0c731a)

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

documentation/ref-manual/ref-variables.xml

@@ -12290,18 +12290,22 @@ recipes-graphics/xorg-font/font-alias_1.0.3.bb:PR = "${INC_PR}.3"
                     By default, the list of variables is empty and is set in
                     the
                     <link linkend='ref-classes-populate-sdk-*'><filename>populate-sdk-ext</filename></link>
-                    class.</para>
+                    class.
+                </para>
 
-                    <para>This list overrides the variables specified using the
+                <para>
+                    This list overrides the variables specified using the
                     <link linkend='var-SDK_LOCAL_CONF_BLACKLIST'><filename>SDK_LOCAL_CONF_BLACKLIST</filename></link>
                     variable as well as any variables identified by automatic
                     blacklisting due to the "/" character being found at the
                     start of the value, which is usually indicative of being a
                     path and thus might not be valid on the system where the
-                    SDK is installed.</para>
+                    SDK is installed.
+                </para>
 
-                    <para>For more information on
-                    <filename>SDK_LOCAL_CONF_WHITELIST</filename>, see the
+                <para>
+                    For additional information on how to customize the
+                    extensible SDK's configuration, see the
                     "<ulink url='&YOCTO_DOCS_SDK_URL;#sdk-configuring-the-extensible-sdk'>Configuring the Extensible SDK</ulink>"
                     section in the Yocto Project Application Development and
                     the Extensible Software Development Kit (eSDK) manual.