doc: move MylesBorins to TSC Emeritus

My availability has become smaller and smaller and I think for now the
best thing to do is to move to TSC Emeritus. Perhaps I'll have more
time to focus on Node.js Leadership again in the future, but for now
I think it's best to officially step back a bit.

So long, and thanks for all the modules o/

PR-URL: #43524
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Juan José Arboleda <soyjuanarbol@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Michael Dawson <midawson@redhat.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>
Reviewed-By: Danielle Adams <adamzdanielle@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

README.md

@@ -180,8 +180,6 @@ For information about the governance of the Node.js project, see
   **Matteo Collina** <<matteo.collina@gmail.com>> (he/him)
 * [mhdawson](https://github.com/mhdawson) -
   **Michael Dawson** <<midawson@redhat.com>> (he/him)
-* [MylesBorins](https://github.com/MylesBorins) -
-  **Myles Borins** <<myles.borins@gmail.com>> (he/him)
 * [RaisinTen](https://github.com/RaisinTen) -
   **Darshan Sen** <<raisinten@gmail.com>> (he/him)
 * [richardlau](https://github.com/richardlau) -
@@ -229,6 +227,8 @@ For information about the governance of the Node.js project, see
   **Mary Marchini** <<oss@mmarchini.me>> (she/her)
 * [mscdex](https://github.com/mscdex) -
   **Brian White** <<mscdex@mscdex.net>>
+* [MylesBorins](https://github.com/MylesBorins) -
+  **Myles Borins** <<myles.borins@gmail.com>> (he/him)
 * [nebrius](https://github.com/nebrius) -
   **Bryan Hughes** <<bryan@nebri.us>>
 * [ofrobots](https://github.com/ofrobots) -