doc: clarify socket.setNoDelay() explanation

Change the description of socket.setNoDelay() to make it clear
that sockets have Nagle's algorithm enabled by default.

Better document the tradeoff of having the algorithm enabled.

Explain the behavior of the function based on the passed arguments.

PR-URL: https://github.com/nodejs/node/pull/31541


Reviewed-By: Denys Otrishko <shishugi@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>