switch from bash to sh shebang

backupscripts/15min_backup.sh

@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/bin/sh
 set -euo pipefail
 
 FILENAME="plexdb_15min_$(date -u +%FT%T).sqlite"

backupscripts/daily_backup.sh

@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/bin/sh
 set -euo pipefail
 
 FILENAME="plexdb_daily_$(date -u +%FT%T).sqlite"

backupscripts/hourly_backup.sh

@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/bin/sh
 set -euo pipefail
 
 FILENAME="plexdb_hourly_$(date -u +%FT%T).sqlite"

backupscripts/monthly_backup.sh

@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/bin/sh
 set -euo pipefail
 
 FILENAME="plexdb_monthly_$(date -u +%FT%T).sqlite"

backupscripts/weekly_backup.sh

@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/bin/sh
 set -euo pipefail
 
 FILENAME="plexdb_weekly_$(date -u +%FT%T).sqlite"