Add smart-card to transports enum

index.bs

@@ -3832,6 +3832,7 @@ It mirrors some fields of the {{PublicKeyCredential}} object returned by
         "usb",
         "nfc",
         "ble",
+        "smart-card",
         "hybrid",
         "internal"
     };
@@ -3855,6 +3856,9 @@ Note: The {{AuthenticatorTransport}} enumeration is deliberately not referenced,
     :   <dfn>ble</dfn>
     ::  Indicates the respective [=authenticator=] can be contacted over Bluetooth Smart (Bluetooth Low Energy / BLE).
 
+    :   <dfn>smart-card</dfn>
+    ::  Indicates the respective [=authenticator=] can be contacted over ISO/IEC 7816 smart card with contacts.
+
     :   <dfn>hybrid</dfn>
     ::  Indicates the respective [=authenticator=] can be contacted using a combination of (often separate) data-transport and proximity mechanisms. This supports, for example, authentication on a desktop computer using a smartphone.