Update Ubuntu version validation
Update Ubuntu version validation

jeffstieler/bedrock-ansible,proteusthemes/pt-ops,newtonne/trellis,roots/trellis,NicBeltramelli/trellis,buluma/trellis,jeffstieler/bedrock-ansible,proteusthemes/pt-ops,roots/bedrock-ansible,NicBeltramelli/trellis,partounian/trellis,roots/trellis,buluma/trellis,roots/bedrock-ansible,newtonne/trellis,newtonne/trellis,buluma/trellis,pressbooks/trellis,NicBeltramelli/trellis,partounian/trellis,partounian/trellis,buluma/trellis,proteusthemes/pt-ops,jeffstieler/bedrock-ansible,pressbooks/trellis,NicBeltramelli/trellis,partounian/trellis