doc: move Derek Lewis back to collaborators
Conclude winter break and resume collaboratorship at start of spring.
Refs: https://github.com/nodejs/node/pull/36514
The astronomical start of spring this year is Saturday, March 20, 2021.
Goals for the season include a more sophisticated and polished hook system (pending results of the discussion topic lead by @GeoffreyBooth) for custom loader use (as well as addressing the outstanding bugs in https://github.com/nodejs/modules).
/cc @trott to check