Build github actions container with ubuntu 20 (focal) (#6291)
Build github actions container with ubuntu 20 (focal) (#6291)

* Build github actions container with ubuntu 20 (focal)
EDUlib/configuration,edx/configuration,mitodl/configuration,EDUlib/configuration,edx/configuration,arbrandes/edx-configuration,arbrandes/edx-configuration,edx/configuration,mitodl/configuration,mitodl/configuration,arbrandes/edx-configuration,mitodl/configuration,edx/configuration,arbrandes/edx-configuration,EDUlib/configuration,EDUlib/configuration,arbrandes/edx-configuration,EDUlib/configuration