missing documentation for swarm events

[albers]

moby/moby#32421 added

• new event types: service, node and secret
• a new scope filter.
• new events (which events?)

These changes should be documented in the CLI reference docs.

[allencloud]

Yeah, I think new event for config is also need in moby/moby and docker/cli. And I put forward a PR moby/moby#34032

[dnephin]

I believe that #314 resolved this, so I'm going to close the issue. If there's still something missing let me know, and I can re-open