tools:gpg-card: Fix an error code for Reset Code.
* tools/gpg-card.c (cmd_unblock): Use GPG_ERR_NO_RESET_CODE.
Cherry-pick from master commit of:
65607fb81def5fc55320a1abfbb8ebdad9512011
- GnuPG-bug-id: T6425
- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>