NO-JIRA: Update github actions
NO-JIRA: Update github actions

Updates OS from Ubuntu 18 to Ubuntu 20
Updates github actions cache, checkout and setup-java to v3

clebertsuconic/activemq-artemis,apache/activemq-artemis,tabish121/activemq-artemis,TomRoss/activemq-artemis,tabish121/activemq-artemis,TomRoss/activemq-artemis,apache/activemq-artemis,TomRoss/activemq-artemis,clebertsuconic/activemq-artemis,tabish121/activemq-artemis,tabish121/activemq-artemis,TomRoss/activemq-artemis,apache/activemq-artemis,clebertsuconic/activemq-artemis,apache/activemq-artemis,clebertsuconic/activemq-artemis