doc: add Michaël Zasso to the CTC

Approved by the CTC at https://github.com/nodejs/node/issues/9420 Reviewers are CTC members who voted for this.

Reviewed-By: Rich Trott rtrott@gmail.com Reviewed-By: Evan Lucas evanlucas@me.com Reviewed-By: Colin Ihrig cjihrig@gmail.com Reviewed-By: Сковорода Никита Андреевич chalkerx@gmail.com Reviewed-By: Ali Ijaz Sheikh ofrobots@google.com Reviewed-By: Julien Gilli jgilli@nodejs.org Reviewed-By: Myles Borins myles.borins@gmail.com Reviewed-By: Anna Henningsen anna@addaleax.net Reviewed-By: Fedor Indutny fedor.indutny@gmail.com Reviewed-By: Ben Noordhuis info@bnoordhuis.nl Reviewed-By: Sakthipriyan Vairamani thechargingvolcano@gmail.com