Generify shell script interpreters.

backup.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 SCRIPT_VERSION="19"
 SCRIPT_URL='https://raw.githubusercontent.com/amidaware/tacticalrmm/master/backup.sh'

install.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 SCRIPT_VERSION="63"
 SCRIPT_URL='https://raw.githubusercontent.com/amidaware/tacticalrmm/master/install.sh'

restore.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 SCRIPT_VERSION="37"
 SCRIPT_URL='https://raw.githubusercontent.com/amidaware/tacticalrmm/master/restore.sh'

troubleshoot_server.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Tactical RMM install troubleshooting script
 # Contributed by https://github.com/dinger1986

update.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 SCRIPT_VERSION="135"
 SCRIPT_URL='https://raw.githubusercontent.com/amidaware/tacticalrmm/master/update.sh'