fix: updated the migrations workflow to run on ubuntu 18 so we can run migrations against mysql 5.7 (#28935)
fix: updated the migrations workflow to run on ubuntu 18 so we can run migrations against mysql 5.7 (#28935)


edx/edx-platform,arbrandes/edx-platform,angelapper/edx-platform,edx/edx-platform,angelapper/edx-platform,eduNEXT/edx-platform,angelapper/edx-platform,edx/edx-platform,arbrandes/edx-platform,arbrandes/edx-platform,arbrandes/edx-platform,edx/edx-platform,eduNEXT/edx-platform,eduNEXT/edx-platform,angelapper/edx-platform,eduNEXT/edx-platform