*: Use /usr/bin/env in shebangs for bash & zsh

To increase the portability (OSX for example has zsh under `/bin/zsh`).

.local/bin/filterHistory

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 ## Author:  druckdev
 ## Created: 2020-06-14

.local/bin/monitor-setup

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 ################################################################################
 #

.local/bin/raw2preview

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 TAGS_TO_TRANSFER=(
 	-Orientation

.local/bin/wifi-mute

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 ## This runs as a crontab every 5minutes ('*/5 *   * * * /usr/local/bin/wifi-mute')