ipa passwd: make help for `--otp` option clearer
Update help for the `--otp` option in `ipa passwd`
to actually explain its usage.
Fixes: https://pagure.io/freeipa/issue/8244
Signed-off-by: Antonio Torres <antorres@redhat.com>
Reviewed-By: Rob Crittenden <rcritten@redhat.com>
Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>