doc: move Timothy to TSC emeritus

PR-URL: #24535
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Myles Borins <myles.borins@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>

Author: TimothyGu

README.md

@@ -203,8 +203,6 @@ For information about the governance of the Node.js project, see
 **Michaël Zasso** <targos@protonmail.com> (he/him)
 * [thefourtheye](https://github.com/thefourtheye) -
 **Sakthipriyan Vairamani** <thechargingvolcano@gmail.com> (he/him)
-* [TimothyGu](https://github.com/TimothyGu) -
-**Tiancheng "Timothy" Gu** <timothygu99@gmail.com> (he/him)
 * [Trott](https://github.com/Trott) -
 **Rich Trott** <rtrott@gmail.com> (he/him)
 
@@ -234,6 +232,8 @@ For information about the governance of the Node.js project, see
 **Bert Belder** <bertbelder@gmail.com>
 * [shigeki](https://github.com/shigeki) -
 **Shigeki Ohtsu** <ohtsu@ohtsu.org> (he/him)
+* [TimothyGu](https://github.com/TimothyGu) -
+**Tiancheng "Timothy" Gu** <timothygu99@gmail.com> (he/him)
 * [trevnorris](https://github.com/trevnorris) -
 **Trevor Norris** <trev.norris@gmail.com>