Storefront theme : Add Categoy to recent products section

I found it , the question is resolved :
Solution :

add_filter( 'storefront_recent_products_args','my_custom_storefront_category_args' );
function my_custom_storefront_category_args( $args ){ 
    $args = array( 
    'limit' => 6, 
    'columns' => 3, 
    'orderby' => 'date', 
    'order' => 'desc', 
    'category' => 'your-cat-slug', 
    'cat_operator' => 'AND' 
    );

    return $args; 
}