roman-numerals: sync

[ErikSchierboom]

Sync the roman-numerals exercise with the latest data, as defined in https://github.com/exercism/problem-specifications/tree/main/exercises/roman-numerals.

• Feel free to close this PR if there is another PR that also syncs this exercise.
• When approved, feel free to merge this PR yourselves (you don't have to wait for me).

As this PR only updates docs and/or metadata, it won't trigger a re-run of existing solutions (see the docs).

[github-actions]

Hello. Thanks for opening a PR on Exercism 🙂

We ask that all changes to Exercism are discussed on our Community Forum before being opened on GitHub. To enforce this, we automatically close all PRs that are submitted. That doesn't mean your PR is rejected but that we want the initial discussion about it to happen on our forum where a wide range of key contributors across the Exercism ecosystem can weigh in.

You can use this link to copy this into a new topic on the forum. If we decide the PR is appropriate, we'll reopen it and continue with it, so please don't delete your local branch.

If you're interested in learning more about this auto-responder, please read this blog post.

---

Note: If this PR has been pre-approved, please link back to this PR on the forum thread and a maintainer or staff member will reopen it.