Upgrade ROOT so GitHub Runners work

We have a series of GitHub tests that rely on GitHub runners that are no longer available. To use the new runners we need to upgrade our ROOT version and make sure nothing in AraSim breaks. 

Associated with the following GitHub Issues:
ARA CVMFS: https://github.com/ara-software/cvmfs/issues/20
AraRoot: https://github.com/ara-software/AraRoot/issues/101