Add note about re-adding NFC keys to WebAuthn article

[dominicjaeger]

Add note about re-adding NFC keys to WebAuthn article

[needs-coffee]

hi @dominicjaeger

did you reproduce this with another key?
Is this specifically an issue with the NFC key that is labled as (migrated from FIDO) or did you test this with another key as well?

If this is the case and is reproducible this could be added to the documentation but probably should be raised on the mobile app repo as well.

[dominicjaeger]

In my first post, both keys initially had the label "Von FIDO migriert" (migrated from FIDO)

Today, I could reproduce the behavior with my second key (which still has the "Von FIDO migriert").
I made screen recordings to show what exactly happens. Sometimes I get one or two sounds as response.

Screenrecorder-2022-01-08-11-01-24-524.mp4

With the default payment app set to undefined, the message "Two-step token is invalid" appeared on Chrome on Android when trying to access vault.bitwarden.com. I haven't noticed this before. It can be seen briefly in this video:

Screenrecorder-2022-01-08-11-11-30-597.mp4

I have not yet removed & added the second key yet. If there is nothing else to test, then I would do that as next step to check if it solves the problem again.