Change Zero Price to Free Label

<?php
if ( ! class_exists( 'WooCommerce' ) ) {
    return;
}

add_filter( 'woocommerce_get_price_html', 'scseed_free_price_label', 10, 2 );
function scseed_free_price_label( $price, $product ) {
    // Only override simple, non-empty zero prices.
    if ( '' !== $product->get_price() && 0.00 === (float) $product->get_price() ) {
        return '<span class="woocommerce-Price-amount amount">' . esc_html__( 'Free', 'woocommerce' ) . '</span>';
    }
    return $price;
}