Mention both 3.7.27 and 3.8.x upgrades to 3.9.x
Mention both 3.7.27 and 3.8.x upgrades to 3.9.x

rabbitmq/rabbitmq-website,rabbitmq/rabbitmq-website,rabbitmq/rabbitmq-website,rabbitmq/rabbitmq-website,rabbitmq/rabbitmq-website