doc: ensure that GPG key used to sign the latest LTS release (12.6.1) is mentioned in README(.md)

Update README.md.

Fixes: #32559

Author: haqer1

README.md

@@ -557,7 +557,7 @@ GPG keys used to sign Node.js releases:
 * **Michaël Zasso** <targos@protonmail.com>
 `8FCCA13FEF1D0C2E91008E09770F7A9A5AE15600`
 * **Myles Borins** <myles.borins@gmail.com>
-`C4F0DFFF4E8C1A8236409D08E73BC641CC11F4C8`
+`0EFFE1BCEFD9C84E3D098152933B01F40B5CA946`
 * **Rod Vagg** <rod@vagg.org>
 `DD8F2338BAE7501E3DD5AC78C273792F7D83545D`
 * **Ruben Bridgewater** <ruben@bridgewater.de>
@@ -575,7 +575,7 @@ gpg --keyserver pool.sks-keyservers.net --recv-keys B9AE9905FFD7803F25714661B63B
 gpg --keyserver pool.sks-keyservers.net --recv-keys 77984A986EBC2AA786BC0F66B01FBB92821C587A
 gpg --keyserver pool.sks-keyservers.net --recv-keys 71DCFD284A79C3B38668286BC97EC7A07EDE3FC1
 gpg --keyserver pool.sks-keyservers.net --recv-keys 8FCCA13FEF1D0C2E91008E09770F7A9A5AE15600
-gpg --keyserver pool.sks-keyservers.net --recv-keys C4F0DFFF4E8C1A8236409D08E73BC641CC11F4C8
+gpg --keyserver pool.sks-keyservers.net --recv-keys 0EFFE1BCEFD9C84E3D098152933B01F40B5CA946
 gpg --keyserver pool.sks-keyservers.net --recv-keys DD8F2338BAE7501E3DD5AC78C273792F7D83545D
 gpg --keyserver pool.sks-keyservers.net --recv-keys A48C2BEE680E841632CD4E44F07496B3EB3C1762
 ```