next.js

28ac6289 - Reapply "fix: handle optional catchalls correctly" (#75442) (#75450)

Reapply "fix: handle optional catchalls correctly" (#75442) (#75450) This is a reapplication of the [original fix](https://github.com/vercel/next.js/pull/75377) for optional catchall routes but narrowed to only when the parameters weren't already valid.