Woocommerce add Bootstrap5 styling to checkout fields

gistfile1.txt

/* WOO CHECKOUT FIELDS BS STYLING */
add_filter('woocommerce_checkout_fields', 'addBootstrapToCheckoutFields');
function addBootstrapToCheckoutFields($fields) {
  foreach ($fields as & $fieldset) {
    foreach ($fieldset as & $field) {
      $field['class'][] = 'form-group';
      $field['input_class'][] = 'form-control';
    }
  }
  return $fields;
}
add_filter('woocommerce_checkout_fields', 'custom_remove_woo_checkout_fields');