Docs for ws-serve link to themselves instead of the 'ws-serve' they intend to be referencing

[endobson]

https://docs.racket-lang.org/rfc6455/index.html#%28def._%28%28lib._net%2Frfc6455..rkt%29._ws-serve%29%29

The link in

This is a convenience entry point, largely directly compatible with ws-serve from the built-in websocket support in older versions of Racket, including all its arguments besides those shown.

to ws-serve should point at the built in ws-serve instead of the binding being documented.