Deprecate the old docker stack on Dockerhub

The last release of the old stack [aiidalab/aiidalab-docker-stack](url) has been [more than a year ago](https://hub.docker.com/layers/aiidalab/aiidalab-docker-stack/latest/images/sha256-8d1e01bb1e2373534f53388a3581492efc581cf0ff2dcd941a221fe8624c984f?context=explore) and we don't plan new releases.

We should update the description on Dockerhub to make it clear that it is deprecated and point users to the new stack at `aiidalab/full-stack`. I guess this needs to be done manually by whoever has access to the aiidalab Dockerhub account. It would be nice to officially archive / deprecate the image, if this is something that Dockerhub supports.