TLS guide: mention that TLSv versions < 1.2 are deprecated
TLS guide: mention that TLSv versions < 1.2 are deprecated

They have known vulnerabilities and are disabled
by default on Erlang 22.

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