doc: update previous version links in BUILDING

[MikeMcC399]

Situation

BUILDING.md > Previous versions of this document provides links:

• Node.js 21
• Node.js 20
• Node.js 18

Change

In BUILDING.md > Previous versions of this document:

1. remove end-of-life Node.js versions 21 and 18
2. add supported LTS versions 24 and 22

[nodejs-github-bot]

Review requested:

• @nodejs/build
• @nodejs/tsc

[Renegade334]

Wonder if there's a better approach than the perennially-stale hardlinks.

[MikeMcC399]

@Renegade334

Wonder if there's a better approach than the perennially-stale hardlinks.

The section BUILDING.md > Previous versions of this document is incorrect in every supported branch and is only maintainable with explicit manual updates that are branch specific. This update task has slipped through the cracks and it would be good to avoid it for the future.

I would suggest to remove the links and replace instead with branch-agnostic text that advises to use BUILDING.md from the branch concerned.

If that sounds good, I would close this PR and open a new one to remove the links. That should be something that is easier to backport and would be perennially correct instead of perennially stale!

Edit: This PR is now in the commit-queue, so I will not close it. Suggestions or a PR to improve how to handle this topic better would need to be handled separately.

[nodejs-github-bot]

Landed in c0b5d89