Attempt to get CI working again

[lurch]

Type of changes

• Other

Checklist

• [ ] I've run the latest black with default args on new code.
• [ ] I've updated CHANGELOG.md and CONTRIBUTORS.md where appropriate.
• [ ] I've added tests for new code.
• [x] I accept that @PyFilesystem/maintainers may be pedantic in the code review.

Description

See https://github.com/actions/upload-artifact/blob/main/docs/MIGRATION.md The old v2 arifact that we were using is now deprecated https://github.blog/changelog/2024-04-16-deprecation-notice-v3-of-the-artifact-actions/