cfgt: documentation update

- Add loadmodule example to highlight ordering requirement

modules/cfgt/doc/cfgt_admin.xml

@@ -161,6 +161,11 @@ modparam("cfgt", "callid_prefix", "TEST-ID%")
 <programlisting  format="linespecific">
 ...
 #!ifdef WITH_DEBUG
+loadmodule "cfgt.so"
+loadmodule "debugger.so"
+#!endif
+...
+#!ifdef WITH_DEBUG
 # ----- cfgt params -----
 modparam("cfgt", "basedir", "/tmp/kamailio/cfgtest")
 modparam("cfgt", "callid_prefix", "TRACE-ID%")