doc: move mafintosh to Collaborators

mafintosh was accidentally added to the TSC list rather than the
Collaborators list. This corrects that.

PR-URL: nodejs#19806
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Michaël Zasso <targos@protonmail.com>

README.md

@@ -252,8 +252,6 @@ For more information about the governance of the Node.js project, see
 **James M Snell** <jasnell@gmail.com> (he/him)
 * [joyeecheung](https://github.com/joyeecheung) -
 **Joyee Cheung** <joyeec9h3@gmail.com> (she/her)
-* [mafintosh](https://github.com/mafintosh)
-**Mathias Buus** <mathiasbuus@gmail.com> (he/him)
 * [mcollina](https://github.com/mcollina) -
 **Matteo Collina** <matteo.collina@gmail.com> (he/him)
 * [mhdawson](https://github.com/mhdawson) -
@@ -422,6 +420,8 @@ For more information about the governance of the Node.js project, see
 **Luca Maraschi** <luca.maraschi@gmail.com> (he/him)
 * [maclover7](https://github.com/maclover7) -
 **Jon Moss** <me@jonathanmoss.me> (he/him)
+* [mafintosh](https://github.com/mafintosh)
+**Mathias Buus** <mathiasbuus@gmail.com> (he/him)
 * [mcollina](https://github.com/mcollina) -
 **Matteo Collina** <matteo.collina@gmail.com> (he/him)
 * [mhdawson](https://github.com/mhdawson) -