doc: move shigeki to emeritus

In email, Shigeki Ohtsu indicated that a move to emeritus would be
appropriate at this time. I'm especially grateful for the crypto and
security work over the years, and I'm sure I'm not the only one.
PR-URL: #36093
Reviewed-By: Shigeki Ohtsu <ohtsu@ohtsu.org>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: Trott

README.md

@@ -402,8 +402,6 @@ For information about the governance of the Node.js project, see
 **Santiago Gimeno**<santiago.gimeno@gmail.com>
 *[seishun](https://github.com/seishun) -
 **Nikolai Vavilov**<vvnicholas@gmail.com>
-*[shigeki](https://github.com/shigeki) -
-**Shigeki Ohtsu**<ohtsu@ohtsu.org> (he/him)
 *[shisama](https://github.com/shisama) -
 **Masashi Hirano**<shisama07@gmail.com> (he/him)
 *[silverwind](https://github.com/silverwind) -
@@ -547,6 +545,8 @@ For information about the governance of the Node.js project, see
 **Sam Roberts**<vieuxtech@gmail.com>
 *[sebdeckers](https://github.com/sebdeckers) -
 **Sebastiaan Deckers**<sebdeckers83@gmail.com>
+*[shigeki](https://github.com/shigeki) -
+**Shigeki Ohtsu**<ohtsu@ohtsu.org> (he/him)
 *[stefanmb](https://github.com/stefanmb) -
 **Stefan Budeanu**<stefan@budeanu.com>
 *[tellnes](https://github.com/tellnes) -