[site-reviews] Use name of user who wrote the response

add_filter('site-reviews/review/build/tag/response/by', function ($name, $review) {
    $responseBy = (int) get_post_meta($review->ID, '_response_by', true);
    if ($user = get_user_by('id', $responseBy)) {
        return $user->display_name ?: $name;
    }
    return $name;
}, 10, 2);