doc: add ES Modules entry to who-to-cc

Add ES Modules entry for who-to-cc. Resisted temptation to change it to
"whom to CC". Did move async_hooks entry, though.

PR-URL: https://github.com/nodejs/node/pull/17205


Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Jon Moss <me@jonathanmoss.me>
Reviewed-By: Alexey Orlenko <eaglexrlnk@gmail.com>