Update help message to reflect proper target

Change-Id: Iaef01c8ce68f20c96e04eb9e2cb3ff47cfab275c
diff --git a/python/Makefile b/python/Makefile
index c78bb7a..aab12bb 100644
--- a/python/Makefile
+++ b/python/Makefile
@@ -64,7 +64,7 @@
 	@echo "venv              : Build local Python virtualenv if did not exist yet"
 	@echo "containers        : Build all the docker containers"
 	@echo "base              : Build a base docker image with a modern version of pip and requirements.txt installed"
-	@echo "adapter_openonu   : Build the openonu openomci adapter docker container"
+	@echo "openonu_adapter   : Build the openonu openomci adapter docker container"
 	@echo "tag               : Tag a set of images"
 	@echo "push              : Push the docker images to an external repository"
 	@echo "pull              : Pull the docker images from a repository"