While we still support Ubuntu 18.04, we will focus testing more-so on 20.04. Therefore, our min-dependency target will now be 20.04 intead of 18.04. Change-Id: Ib136480e5f9953d216bd5ffc6f0ae3faa1bf2e82 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/47341 Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Jason Lowe-Power <power.jg@gmail.com> Maintainer: Jason Lowe-Power <power.jg@gmail.com>