Added comment that scale docker compose config is not supported

docker/docker-compose.yml

@@ -30,6 +30,7 @@ services:
   tb-js-executor:
     restart: always
     image: "${DOCKER_REPO}/${JS_EXECUTOR_DOCKER_NAME}:${TB_VERSION}"
+    # 'scale' configuration is not supported in V2
     # in case docker compose plugin V2 is used please update next line in docker-start-services.sh file:
     # docker compose $COMPOSE_ARGS --scale tb-js-executor=10
     scale: 10