Fix: Use uv to install build

    runs-on: ubuntu-latest

    steps:

      - uses: actions/checkout@v4

      - uses: actions/setup-python@v5

        with:

          python-version: '3.9'

          cache: 'pip'

      - uses: actions/download-artifact@v4

        with:

          name: README

          path: README

      - run: mv README/README.md README.md

      - run: python -m build --sdist

      - uses: astral-sh/setup-uv@v4

      - run: uvx build --sdist

      - uses: actions/upload-artifact@v4

        with:

          name: dist-sdist