If you've received a new card and your 16 digit card number is the same as your old card, you do not have to do anything. Your digital wallet will automatically update to take payments from your new card. This is often the case if you've received an automatic replacement for an expiring card.
If you've received a new card and your 16 digit card number is different to your old card, you will need to remove your old card from your digital wallet, then add in your new card details. This is often the case if you've reported your old card as lost/stolen, or if there has been fraudulent transactions on your old card.