doc: move release key for Myles Borins

Myles has stepped down as a releaser. Move his key in `README.md`
to the "Other keys used to sign some previous releases" section.

PR-URL: #54059
Refs: nodejs/Release#1024
Refs: https://github.com/nodejs/Release/blob/main/GOVERNANCE.md#offboarding-releasers
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
Reviewed-By: Ulises Gascón <ulisesgascongonzalez@gmail.com>

README.md

@@ -777,8 +777,6 @@ Primary GPG keys for Node.js Releasers (some Releasers sign with subkeys):
   `CC68F5A3106FF448322E48ED27F5E38D5B0A215F`
 * **Michaël Zasso** <<targos@protonmail.com>>
   `8FCCA13FEF1D0C2E91008E09770F7A9A5AE15600`
-* **Myles Borins** <<myles.borins@gmail.com>>
-  `C4F0DFFF4E8C1A8236409D08E73BC641CC11F4C8`
 * **Rafael Gonzaga** <<rafael.nunu@hotmail.com>>
   `890C08DB8579162FEE0DF9DB8BEAB4DFCF555EF4`
 * **Richard Lau** <<rlau@redhat.com>>
@@ -798,7 +796,6 @@ gpg --keyserver hkps://keys.openpgp.org --recv-keys 74F12602B6F1C4E913FAA37AD3A8
 gpg --keyserver hkps://keys.openpgp.org --recv-keys DD792F5973C6DE52C432CBDAC77ABFA00DDBF2B7 # Juan José Arboleda
 gpg --keyserver hkps://keys.openpgp.org --recv-keys CC68F5A3106FF448322E48ED27F5E38D5B0A215F # Marco Ippolito
 gpg --keyserver hkps://keys.openpgp.org --recv-keys 8FCCA13FEF1D0C2E91008E09770F7A9A5AE15600 # Michaël Zasso
-gpg --keyserver hkps://keys.openpgp.org --recv-keys C4F0DFFF4E8C1A8236409D08E73BC641CC11F4C8 # Myles Borins
 gpg --keyserver hkps://keys.openpgp.org --recv-keys 890C08DB8579162FEE0DF9DB8BEAB4DFCF555EF4 # Rafael Gonzaga
 gpg --keyserver hkps://keys.openpgp.org --recv-keys C82FA3AE1CBEDC6BE46B9360C43CEC45C17AB93C # Richard Lau
 gpg --keyserver hkps://keys.openpgp.org --recv-keys 108F52B48DB57BB0CC439B2997B01419BD92F80A # Ruy Adorno
@@ -834,6 +831,8 @@ verify a downloaded file.
   `61FC681DFB92A079F1685E77973F295594EC4689`
 * **Julien Gilli** <<jgilli@fastmail.fm>>
   `114F43EE0176B71C7BC219DD50A3051F888C628D`
+* **Myles Borins** <<myles.borins@gmail.com>>
+  `C4F0DFFF4E8C1A8236409D08E73BC641CC11F4C8`
 * **Rod Vagg** <<rod@vagg.org>>
   `DD8F2338BAE7501E3DD5AC78C273792F7D83545D`
 * **Ruben Bridgewater** <<ruben@bridgewater.de>>