entrypoint: Update for incompatible change to setup-certbot usage
entrypoint: Update for incompatible change to setup-certbot usage

https://github.com/zulip/zulip/pull/10699

Signed-off-by: Anders Kaseorg <087231934ba8fcf78bc142ce37d193b895ac03c4@mit.edu>

Galexrt/docker-zulip,Galexrt/docker-zulip,Galexrt/docker-zulip