emqx/changes/ce/fix-10462.en.md

Deprecate config broker.shared_dispatch_ack_enabled. This was designed to avoid dispatching messages to a shared-subscription session which has the client disconnected. However since v5.0.9, this feature is no longer useful because the shared-subscrption messages in a expired session will be redispatched to other sessions in the group. See also: https://github.com/emqx/emqx/pull/9104