meta: move chrisdickinson to Collaborator Emeriti list

Chris confirmed in email that he could be moved to Collaborator Emeritus
status.

PR-URL: https://github.com/nodejs/node/pull/27703


Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>