renew-certs: Always run handlers.

Because of the convoluted way I'm running tasks, there's only 1 host in
the play but the handlers are for the remote hosts. Run them even if
there's a failure to restart whatever is needed since the failure will
always be for the local host.

Ansible/renew-certs.yaml

@@ -2,6 +2,7 @@
 - name: Generate keys and certificates
   hosts:
     - localhost
+  force_handlers: true
   gather_facts: false
   handlers:
     - name: Restart Nginx on host01