Suggestion for another Common Error

[TheGreen0ne]

As @mrclschstr already posted in https://github.com/brush701/keechallenge/issues/38#issuecomment-490413906

KeeChallenge v1.5 works fine for me with KeePass v2.41. With KeePass v2.42 and v2.42.1 I have issues unlocking my database, because my Yubikey does not blink and "offer" the key press. The unlocking simply runs into a timeout.

EDIT: The KeePass update resetted my slot in the KeeChallenge Settings dialogue. Setting up the correct slot fixed that for me!

I'd suggest to add this solution to the Common Errors section in the readme.

It really helped me with updating from Keepass 2.44 to 2.45 and this solution was hard to find.