Use portable shebangs in wrapper scripts (#79)

This is the recommended approach and it's necessary on systems like NixOS.

See: https://web.archive.org/web/20220617225709/https://unix.stackexchange.com/questions/29608/why-is-it-better-to-use-usr-bin-env-name-instead-of-path-to-name-as-my

chrome/curl_chrome101

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Find the directory of this script
 dir=${0%/*}