meta: move gdams to emeritus

George does not appear to be active in Node.js for quite some time
(correction welcome!) and my attempts to get in touch have failed.

PR-URL: https://github.com/nodejs/node/pull/39539


Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Robert Nagy <ronagy@icloud.com>
Reviewed-By: Beth Griggs <bgriggs@redhat.com>
Reviewed-By: George Adams <george.adams@microsoft.com>
Reviewed-By: Stewart X Addison <sxa@redhat.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Myles Borins <myles.borins@gmail.com>
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
Reviewed-By: Michael Dawson <midawson@redhat.com>