doc: remove obsolete cc recommendations

In 2016, Ali added the instruction to cc him on particular V8 bugs and
the suggestion to contact him for certain problems. However, I'm pretty
sure Ali has not been working on V8 for 2+ years at this point. I'm
guessing those instructions are obsolete at this point. (I'll ping him
in the PR for this change to confirm, though.)

Also: Remove a parenthetical and add a comma, because I can't imagine
opening a separate pull request to add a comma. (OK, I'm lying, I
totally can and if anyone has done that in the past, it's probably me.)

PR-URL: https://github.com/nodejs/node/pull/39181


Reviewed-By: Michael Dawson <midawson@redhat.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>