• Fix CheckoutRemovePromoCode mutation, when the voucher promoCodeId is provided, look through all voucher codes and clear the checkout voucher code if it belongs to the provided voucher - #16138 by @Air-t
• Extend OrderLine type with isPriceOverridden field and make unitDiscountType nullable - #16104 by @IKarbowiak
• Improve validation for email plugins, add support for env var USER_EMAIL_URL - #16100 by @8r2y5