refactor: update outdated ESLint and OpenJS links

[electrohyun]

Prerequisites checklist

• I have read the contributing guidelines.

AI acknowledgment

• I did not use AI to generate this PR.
• (If the above is not checked) I have reviewed the AI-generated content before submitting.

What is the purpose of this pull request?

This repository still contains a few links that point to old domains and old documentation paths. They all respond with HTTP 200, so they appear to work, but following the redirects to their final destination reveals a defunct domain or a restructured docs path. This PR updates them to the URLs that eslint/eslint currently uses.

I verified each link's final destination by opening it directly in a browser.

What changes did you make? (Give an overview)

All three files are the same kind of link update, so I grouped them into a single PR. Happy to split it up if you'd prefer.

1. CONTRIBUTING.md

• Code of Conduct link: https://js.foundation/community/code-of-conduct → https://eslint.org/conduct
  (The old link redirects to the foundation homepage rather than the Code of Conduct document. The new link also redirects, but it lands on the actual document, and eslint/eslint uses this same link.)
• Also updated the link text from "JS Foundation" to "OpenJS Foundation".
• CLA link: https://cla.js.foundation/eslint/eslint → https://cla.openjsf.org/
• Pull Request Guidelines link: .../docs/developer-guide/contributing/pull-requests → .../docs/latest/contribute/pull-requests
  (The old link still resolves via redirect, but it uses the old domain and old docs path.)

2. docs/commit-message-check.md

• Updated two old docs-path links to docs/latest/contribute/... (the #step-2-make-your-changes still exists on the new page, so it was kept).

3. src/plugins/commit-message/createMessage.js

• Updated the link inside the comment message the bot posts on PRs to docs/latest/contribute/.

Related Issues

None

Is there anything you'd like reviewers to focus on?

• The change to index.test.js.snap (108 lines) is the regenerated output from jest -u, reflecting the updated link in createMessage.js. I reviewed the generated diff and confirmed that nothing other than the link string changed.

[lumirlumir]

Thanks for opening the PR. I left one comment.

Also, I’m marking the PR title as refactor, since it modifies src/plugins/commit-message/createMessage.js.

[lumirlumir]

I’m closing and reopening this PR to rerun the CI.

[lumirlumir]

LGTM, thanks!