spec: Re-word documentation of ListQueuedOwners

This was previously written in an unusual message-passing-oriented
style, which obscured the meaning. Use a more method-call-oriented
style instead.

[smcv: separated out from a larger commit, added commit message]
Reviewed-by: Simon McVittie <smcv@collabora.com>

doc/dbus-specification.xml

@@ -5644,9 +5644,7 @@
           </informaltable>
         </para>
         <para>
-          This method call should be sent to
-          <literal>org.freedesktop.DBus</literal> and lists the connections
-          currently queued for a bus name (see
+          List the connections currently queued for a bus name (see
           <xref linkend="term-queued-owner"/>).
         </para>
        </sect3>