meta: align collaborator email in .mailmap/AUTHORS with README

Use the most recent and presumably preferred email for a collaborator
whose .mailmap and README entries differ.

PR-URL: https://github.com/nodejs/node/pull/39478


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>