doc: expand openssl instructions

Refs: https://github.com/nodejs/node/pull/36541

Expand the instructions to cover what is needed when
updates are required across all active release lines

PR-URL: https://github.com/nodejs/node/pull/36554


Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Myles Borins <myles.borins@gmail.com>