Merge pull request #9 from fujiwara/fix-shebang

shebang must be placed at the first line.

Author: toricls

check-ecs-exec.sh

@@ -1,7 +1,8 @@
+#!/usr/bin/env bash
+
 # Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 # SPDX-License-Identifier: MIT-0
 
-#!/usr/bin/env bash
 # shellcheck disable=SC2059
 
 # Script Name: check-ecs-exec.sh