Hi,
Add this code snippet to the child theme functions.php and change th Heading tag
function woodmart_cart_side_widget() {
if( ! whb_is_side_cart() ) return;
?>
<div class="cart-widget-side">
<div class="widget-heading">
<h3 class="widget-title"><?php esc_html_e('Shopping cart', 'woodmart'); ?></h3>
<a href="#" class="widget-close"><?php esc_html_e('close', 'woodmart'); ?></a>
</div>
<div class="widget woocommerce widget_shopping_cart"><div class="widget_shopping_cart_content"></div></div>
</div>
<?php
}
add_action( 'wp_footer', 'woodmart_cart_side_widget', 140 );
Regards