Take expected platforms from reference slot
https://gitlab.cern.ch/lhcb-rta/reference-update-bot/-/jobs/17991000
reference_update_bot.utils.RefBotException: 🚨🤖🚨 Expected these platforms: ['x86_64_v2-centos7-gcc11-opt', 'x86_64_v2-centos7-gcc11-dbg', 'x86_64_v2-centos7-clang12-opt', 'x86_64_v2-centos7-clang12-dbg', 'x86_64_v3-centos7-gcc11-opt+g']
But received these: {'x86_64_v2-centos7-clang12-opt', 'x86_64_v3-centos7-gcc11-opt+g', 'x86_64_v2-centos7-gcc11-dbg', 'x86_64_v2-centos7-gcc11-opt'}We should probably take the expected platforms from the reference slot in order to be future proof.