Cart redirect after adding product to cart

//Cart Redirect for Studio Sessions
function my_custom_add_to_cart_redirect( $url ) {

	if ( ! isset( $_REQUEST['add-to-cart'] ) || ! is_numeric( $_REQUEST['add-to-cart'] ) ) {
		return $url;
	}

	$product_id = apply_filters( 'woocommerce_add_to_cart_product_id', absint( $_REQUEST['add-to-cart'] ) );

	// Only redirect products that have the 'studio-sessions' category
	if ( has_term( 'studio-sessions', 'product_cat', $product_id ) ) {
		$url = WC()->cart->get_checkout_url();
	}

	return $url;

}
add_filter( 'woocommerce_add_to_cart_redirect', 'my_custom_add_to_cart_redirect' );