improve rename

Makefile

@@ -78,6 +78,7 @@ rename:
 	@sed -i "s|^name: .*|name: $(APP)|g" helm/Chart.yaml
 	@sed -i "s|otelServiceName: .*|otelServiceName: $(APP)|g" helm/values.yaml
 	@sed -i "s|app=.*|app=$(APP)|g" helm/values.yaml
+	@sed -i "s|$(CMD_NAME)|$(APP)|g" README.md
 	@find . -type f -a \
 	\( -name '*.go' -o -name 'go.mod' \
 		-o -name 'go.sum' -o -name '*.proto' \