Ensure wheels are built from sdists

Since build 0.5.0, the default behaviour of `python -m build` is
to create the sdist first, and then to create the wheel from the
sdist. Using `--sdist --wheel` prevents the desired default behaviour.

Author: molinav

.github/workflows/build.yml

@@ -34,7 +34,7 @@ jobs:
         run: |
           cd packages/${{ matrix.package }}
           python -m pip install build wheel
-          python -m build --sdist --wheel
+          python -m build
 
       - uses: actions/upload-artifact@v4
         with: