NO-JIRA: update release instructions to reflect change to CDN, and clarify some bits
NO-JIRA: update release instructions to reflect change to CDN, and clarify some bits

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