change commissioning method

Author: khodya

src/python_testing/TC_CNET_4_1.py

@@ -26,7 +26,7 @@
 #     script-args: >
 #       --endpoint 0
 #       --storage-path admin_storage.json
-#       --commissioning-method on-network
+#       --commissioning-method ble-wifi
 #       --discriminator 1234
 #       --passcode 20202021
 #       --trace-to json:${TRACE_TEST_JSON}.json