Actions - remove OS 'latest', use Ubuntu 20.04, JRuby stays on 18.04
Actions - remove OS 'latest', use Ubuntu 20.04, JRuby stays on 18.04

puma/puma,eileencodes/puma,puma/puma,puma/puma,eileencodes/puma,puma/puma,eileencodes/puma,eileencodes/puma