Explicitly document that adding an API to the global scope requires
`semver-major` label. Waiving the `semver-major` requires a regular
TSC consensus process.
PR-URL: https://github.com/nodejs/node/pull/54330
Refs: https://github.com/nodejs/node/pull/54329
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Michael Dawson <midawson@redhat.com>
