Please update docs to show `controlBusOnRegistry()`, not `controlBus()`

[joshlong]

https://docs.spring.io/spring-integration/reference/control-bus.html <- the docs here show the now deprecated controlBus() methods on the IntegrationFlow DSL. Please update to show controlBusOnRegistry()

[artembilan]

Well, the idea is to deprecate a new controlBusOnRegistry() in the next version and de-deprecate the old one, restoring, essentially, the status-quo of the mentioned doc.