fix the type for $recursiveAnchor

[karenetheridge]

This replaces #1200, as it was decided the change cannot go into the patch release.

[jdesrosiers]

The draft-next branch has been merged and is now closed. The merge target for this PR has been changed to main. Here are the recommended steps to get your branch reabsed properly.

1. Make sure your remote for the json-schema-org/json-schema-spec repo is up-to-date. (Example: git fetch upstream).
2. Rebase your commits onto main. (Example: git rebase --onto upstream/main abcd123~1 (replace abcd123 with the commit hash of the first commit in your PR)).
3. Force push the rebased branch to your fork. (Example: git push --force origin my-branch).

[handrews]

@karenetheridge if you rebase this onto main it looks like it would be a straightforward approval now, I think?

[karenetheridge]

This has been rebased.