docs: Update the format of the generate metadata example

Initially, update the UUID field to have the proper format, but
then also changed the type, id, and name fields.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>
Reviewed-by: NErik Skultety <eskultet@redhat.com>

docs/formatdomain.html.in

@@ -31,9 +31,9 @@
     <h3><a id="elementsMetadata">General metadata</a></h3>
 
 <pre>
-&lt;domain type='xen' id='3'&gt;
-  &lt;name&gt;fv0&lt;/name&gt;
-  &lt;uuid&gt;4dea22b31d52d8f32516782e98ab3fa0&lt;/uuid&gt;
+&lt;domain type='kvm' id='1'&gt;
+  &lt;name&gt;MyGuest&lt;/name&gt;
+  &lt;uuid&gt;4dea22b3-1d52-d8f3-2516-782e98ab3fa0&lt;/uuid&gt;
   &lt;title&gt;A short description - title - of the domain&lt;/title&gt;
   &lt;description&gt;Some human readable description&lt;/description&gt;
   &lt;metadata&gt;