Use bash for cron.sh

cron.sh

-#!/bin/sh
+#!/usr/bin/env bash
 cd $(dirname "$0")
 
 URL="https://www.utwente.nl/en/educational-systems/about_the_applications/canvas/policies/privacy-statement/"
@@ -11,5 +11,3 @@ wget -q -O "${SITE_DIR}/index.html" "${URL}"
 git add site
 git commit -m "Update at $(date '+%F %T')" >/dev/null
 git push
-
-exit 0