GTP-Templates: fix incorrect comment

Change-Id: I81c518a8ce23e3e830b173e4af34b3a5414148af
Related: OS#5760
diff --git a/library/GTP_Templates.ttcn b/library/GTP_Templates.ttcn
index 921d1e8..9782a3a 100644
--- a/library/GTP_Templates.ttcn
+++ b/library/GTP_Templates.ttcn
@@ -194,7 +194,7 @@
 	}
 
 
-	/* template matching reception of GTP-C echo-request */
+	/* template matching reception of GTP-C unit-data */
 	template Gtp1cUnitdata tr_GTPC_MsgType(template GtpPeer peer, template OCT1 msg_type, template OCT4 teid, template GTPC_PDUs pdus := ?) := {
 		peer := peer,
 		gtpc := tr_GTP1C_PDU(msg_type, teid, pdus)