improve rename

Makefile

@@ -73,7 +73,8 @@ rename:
 		exit 1; \
 	fi
 	@sed -i "s|APP_NAME=.*|APP_NAME=$(APP)|g" Dockerfile
-	@sed -i "s|CMD_NAME := .*|CMD_NAME := $(APP)|g" Makefile
+	@sed -i "s|^CMD_NAME := .*|CMD_NAME := $(APP)|g" Makefile
+	@sed -i "s|merge_file_name=.*|merge_file_name=$(APP)|g" buf.gen.yaml
 	@find . -type f -a \
 	\( -name '*.go' -o -name 'go.mod' \
 		-o -name 'go.sum' -o -name '*.proto' \