Sdist isn't getting published

[wallentx]

In our workflow, we are using pep517.build (which is deprecated) to build the wheel: https://github.com/Chia-Network/clvm/blob/26bb83c2f988dd0a2855c8466e224bd6f0743e69/.github/workflows/publish-to-test-pypi.yml#L32-L44 We aren't building the sdist. If we were to use pip install build, and then python -m build --outdir dist/ ., this should provide the sdist and the wheel to publish to pypi.