doc: add edsadr to collaborators

PR-URL: https://github.com/nodejs/node/pull/10883


Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Italo A. Casas <me@italoacasas.com>
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>