pgw: Fix typo in comment

Change-Id: Ie768044d9f80cc3837685167d98a1e270d0abde4
diff --git a/pgw/PGW_Tests.ttcn b/pgw/PGW_Tests.ttcn
index 281f816..fb893fc 100644
--- a/pgw/PGW_Tests.ttcn
+++ b/pgw/PGW_Tests.ttcn
@@ -1031,7 +1031,7 @@
 
 	d := activate(as_DIA_Gy_CCR(UPDATE_REQUEST));
 	f_ping4(mp_ping_hostname);
-	/* Let the CCA reach the GGSN */
+	/* Let the CCA reach the PGW */
 	f_sleep(0.5);
 	deactivate(d);
 	f_validate_gy_cc_report(g_rx_gy, VALIDITY_TIME, (3..4), (28..1000), (28..1000));