customslug.php

add_filter( 'your-post-type_post_type_args', '_my_rewrite_slug' ); // Here replace "your-post-type" with the actual post type, e.g., "cherry_services", "cherry-projects"
            function _my_rewrite_slug( $args ) {
            $args['rewrite']['slug'] = 'our-services'; // Replace "our-services" with your preferable slug
            return $args;
        }