Make shebangs in scripts directory more portable

scripts/crd_to_kcl.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 if [ "$#" -lt 1 ] || [ "$#" -gt 2 ]; then
     echo "Usage: $0 <github-repo-url> <version-tag>"

scripts/helm_to_kcl.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # TODO: Make this take a normal helm package name and repo location.  This
 # script tries to avoid changing any local state, like your helm repository
 # list.  To do this with helm, you to link to the tgz of the helm package

scripts/push_pkg_from.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 KCL_MOD_FILE_PATH="$1"
 

scripts/reg.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # create a directory to store user passwords
 mkdir -p ./scripts/registry_auth