updated shebang for better multi system support

start.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2020-2022 The Hush Developers
 # Released under GPLv3
 

util/build-debian-package.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright (c) 2021-2022 The Hush developers
 # Distributed under the GPLv3 software license, see the accompanying
 # file LICENSE or https://www.gnu.org/licenses/gpl-3.0.en.html