doc: clarify that priorities applies to values

In the discussion on https://github.com/nodejs/node/pull/40235

 it
was mentioned that there might be confusion that some of the
items listed were technical priorities versus priorities
being for the values listed. Tweak to clarify.

Signed-off-by: Michael Dawson <mdawson@devrus.com>

PR-URL: https://github.com/nodejs/node/pull/40318


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