Added the requested comment

Author: ni-jfitzger

src/nidigital/templates/_grpc_stub_interpreter.py/enable_match_fail_combination.py.mako

@@ -0,0 +1,5 @@
+## This file is empty. We won't support gRPC, for now.
+## Even though gRPC Device supports the function, the nisync Python API lacks gRPC support, so there's no point.
+## If a user tries to call enable_match_fail_combination with a session runing on a gRPC Device Server, they will get an error
+## because the method does not exist in _grpc_stub_interpreter.py.
+## Most likely it will be an AttributeError, though it hasn't been tested.