Merge pull request #4405 from c-po/certbot-T7249

pki: T7249: fix shebang to support CLI backend

Author: dmbaturin

src/helpers/vyos-certbot-renew-pki.sh

@@ -1,3 +1,3 @@
-#!/bin/sh
+#!/bin/vbash
 source /opt/vyatta/etc/functions/script-template
 /usr/libexec/vyos/conf_mode/pki.py certbot_renew