Divi change project category slug

add_filter( 'register_taxonomy_args', 'change_taxonomies_slug', 10, 2 );
function change_taxonomies_slug( $args, $taxonomy ) {

   if ( 'project_category' === $taxonomy ) {
      $args['rewrite']['slug'] = 'stainless-steel-products';
   }

   return $args;
}