Fix shebang

scripts/check-if-installed..sh → scripts/check-if-installed.sh

-#!/bin/bash
+#!/bin/sh
 set -exu
 
 # Change working directory to the drupal code

scripts/clear-cache.sh

-#!/bin/bash
+#!/bin/sh
 set -exu
 
 # Change working directory to the drupal code

scripts/database-backup.sh

-#!/bin/bash
+#!/bin/sh
 set -exu
 
 # Change working directory to the drupal code

scripts/database-restore.sh

-#!/bin/bash
+#!/bin/sh
 set -exu
 
 # Change working directory to the drupal code

scripts/disable-maintenance-mode.sh

-#!/bin/bash
+#!/bin/sh
 set -exu
 
 # Change working directory to the drupal code

scripts/enable-maintenance-mode.sh

-#!/bin/bash
+#!/bin/sh
 set -exu
 
 # Change working directory to the drupal code

scripts/site-install.sh

-#!/bin/bash
+#!/bin/sh
 set -exu
 
 # Change working directory to the drupal code