flyctl stuck on secret unset when app scale is zero

Hello,

Minor thing here that is easily solved via ctrl-c, but I just experienced a stuck flyctl when unsetting a secret:

> fly secrets unset SECRET_MESSAGE
Release v16 created
==> Monitoring deployment
Logs: https://fly.io/apps/MYAPPS/monitoring
^C

I guess it was waiting for the 0th instance to successfully come up?

After interrupting it, I could see that the secret was successfully unset so this is just a minor annoyance, although perhaps it could be more than that if running in an unattended script.

Just a quick heads up and I did not test any other flyctl commands with my app scaled to zero, so there may be other places this pops up too.