r/minio: Fix ExecReload command

Sending SIGHUP to the main PID (i.e. conmon) ends up stopping the
service.  What we really want is to send the signal to main PID _inside_
the container.  We can achieve this by using `podman kill` instead of
`kill`.

roles/minio/templates/minio.container.j2

@@ -15,7 +15,7 @@ Network=host
 NoNewPrivileges=yes
 
 [Service]
-ExecReload=/bin/kill -HUP $MAINPID
+ExecReload=/usr/bin/podman kill -s HUP --cidfile %t/%N.cid
 TimeoutStartSec=5min
 Restart=always
 MemoryDenyWriteExecute=yes