2a6ea79260
This updates the mix.exs code from commit 8ca12d4 (ejabberd 21.07)
Consequently, no need in make-binaries to update ERLANG_NODE.
The ecs docker image 23.04 got a similar change in
https://github.com/processone/docker-ejabberd/pull/73/commits/f81905d5e315d2eb813a715b51d4a8351a7d4e6b