fix: 统一脚本shebang为#!/usr/bin/env bash

pkg/docker/linux/usr/local/etc/omc/script/entrypoint.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # shellcheck disable=SC1091
 
 set -o errexit

pkg/docker/linux/usr/local/etc/omc/script/postunpack.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # shellcheck disable=SC1091
 
 set -o errexit

pkg/docker/tar/omc-docker.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 OMC_CONTAINER_NAME="omc"
 MYSQL_CONTAINER_NAME="omc_mariadb"