Storefront: change homepage product categories

storefront-homepage-product-categories.php

<?php

// Hooking into the storefront_product_categories_args hook
add_filter( 'storefront_product_categories_args', 'marce_filter_homepage_product_categories_storefront', 11 );

// We're changing the values of limit, columns, and title for the Product Categories homepage section.
function marce_filter_homepage_product_categories_storefront( $args ) {
	$args['limit'] = 1;
	$args['columns'] = 4;
	$args['title'] = 'Shop Categories';

	return $args;
}