doc: fix LTS replaceme tags

When cherry-picking release commits for LTS releases into master,
the `REPLACEME` metadata can be taken over as well, to give users
a more accurate view of what is being released on which release line.

This addresses this problem for all previous LTS releases for which
this has not been done.

Fixes: https://github.com/nodejs/node/issues/33001

PR-URL: https://github.com/nodejs/node/pull/33041


Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Shelley Vohr <codebytere@gmail.com>