testing/py3-scs: upgrade to 3.2.3
https://github.com/cvxgrp/scs/releases/tag/3.2.3
the changelog had a note about tests working again, but.. the maintainer removed that note in the meantime
https://github.com/cvxgrp/scs/releases/tag/3.2.3
the changelog had a note about tests working again, but.. the maintainer removed that note in the meantime