[MarketShip] Change free shipping help text with template override

shipping-method-settings.php

<?php
/**
 * Shipping method settings template.
 *
 * Overridden to output custom help text for Free Shipping.
 *
 * @global MarketShip_Shipping_Method $shipping_method Shipping method instance.
 *
 * @author  Brett Porcelli <brett@thepluginpros.com>
 * @package MarketShip
 * @version 5.1.1
 */

if ( ! defined( 'ABSPATH' ) ) {
    exit;
}

?>
<form action="" method="post" id="shipping-form" class="dokan-form-horizontal marketship-form method-settings-form">
    <?php if ( 'free_shipping' === $shipping_method->id ) : ?>
        <p><?php esc_html_e( 'My free shipping help text' ); ?></p>
    <?php endif; ?>

    <?php $shipping_method->vendor_options( 'dokan' ); ?>

    <?php if ( $shipping_method->supports( 'submit-button' ) ) : ?>
        <div class="dokan-form-group">
            <div class="dokan-w12 ajax_prev">
                <input type="hidden" name="method_id" value="<?php echo esc_attr( $shipping_method->id ); ?>">
                <button type="submit" name="dokan_update_marketship_settings" class="dokan-btn dokan-btn-info">
                    <?php esc_html_e( 'Save Changes', 'marketship' ); ?>
                </button>
            </div>
        </div>
    <?php endif; ?>
</form>