doc: move DEP0018 to End-of-Life

3b10f7f9

 resolves DEP0018. Move it to End-of-Life.

Co-authored-by: Anna Henningsen <github@addaleax.net>

PR-URL: https://github.com/nodejs/node/pull/35316


Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
Reviewed-By: Shelley Vohr <codebytere@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>