TC_WHM_2_1: Fix incorrect --aplication argument (#36578)
It should be `water-heater` instead of `evse`.
diff --git a/src/python_testing/TC_WHM_2_1.py b/src/python_testing/TC_WHM_2_1.py
index b9dcb02..538450e 100644
--- a/src/python_testing/TC_WHM_2_1.py
+++ b/src/python_testing/TC_WHM_2_1.py
@@ -26,7 +26,7 @@
# --discriminator 1234
# --KVS kvs1
# --trace-to json:${TRACE_APP}.json
-# --application evse
+# --application water-heater
# script-args: >
# --storage-path admin_storage.json
# --commissioning-method on-network