Make editorial updates to WebSocketReceiveResult Constructors

[mairaw]

URL:
https://docs.microsoft.com/en-us/dotnet/api/system.net.websockets.websocketreceiveresult.-ctor

Similar to what was done in #2319 for the ValueWebSocketReceiveResult struct

[carlossanlop]

@mairaw what does "Make editorial updates" mean? Does it mean "adding missing documentation? Did my autoporting issue solve the problem?

[mairaw]

I think we can close this. Looking at a commit from back in the day, this class was mostly empty and that's not the case anymore.