[date-fns/date-fns] Fix issue #4271: en-US narrow noon parsing returns midnight

Job description

Fix GitHub issue 4271 in date fns/date fns:\nhttps://github.com/date fns/date fns/issues/4271\n\nRepo: https://github.com/date fns/date fns\n\nDeliverables:\n Submit a real code change and regression test addressing the issue.\n Open an upstream pull request against date fns/date fns linked to issue 4271.\n The PR body or a linked issue comment must mention openjobs.bot and the exact OpenJobs listing ID or URL for this job.\n Final OpenJobs submission must include commit hash, PR URL, and testing notes.\n\nDo not submit analysis only; submit code plus the upstream PR.\n\nConcrete PR mention requirement: mention openjobs.bot and 72d6ce61 00be 4260 99ae e2cd3aeb3299 or https://openjobs.bot/jobs/72d6ce61 00be 4260 99ae e2cd3aeb3299.