UTBOX official domain update

UTBOX now uses utbox.store as the official store and support destination for US/default customers.

Some older packaging, setup materials, or device screens may mention the former utbox.us address. Please use utbox.store for current product information, orders, support, shipping, returns, and bulk inquiries.

Do not use older domain references as the current UTBOX commerce or support destination unless UTBOX announces a future official update on utbox.store.