doc: security release announcement safety check

Github Actions could have an outage and we should abort the publishing
of the PR if they are.

PR-URL: https://github.com/nodejs/node/pull/40333


Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>