Fix publish job in CI (#15)

* Fix publish job in CI

* Fix for upload-artifact@v4 and download-artifact@v4

.github/workflows/build_and_publish.yml

@@ -38,8 +38,8 @@ jobs:
 
       - uses: actions/upload-artifact@v4
         with:
-          name: cibw-wheels-${{ matrix.os }}-${{ strategy.job-index }}
-          path: ./wheelhouse/*.whl
+          name: wheelhouse_wheel_${{ matrix.os }}
+          path: wheelhouse/*.whl
           retention-days: 1
 
   build_sdist:
@@ -53,6 +53,7 @@ jobs:
 
       - uses: actions/upload-artifact@v4
         with:
+          name: wheelhouse_sdist
           path: wheelhouse/*.tar.gz
           retention-days: 1
 
@@ -63,12 +64,18 @@ jobs:
     # Upload to PyPI on every tag
     if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/')
     steps:
-      - uses: actions/download-artifact@v3
+      - name: Download artifacts produced during the build_wheels and build_sdist jobs
+        uses: actions/download-artifact@v4
         with:
-          name: artifact
+          merge-multiple: true
           path: wheelhouse
 
-      - uses: pypa/gh-action-pypi-publish@release/v1
+      - name: Display structure of downloaded files
+        run: ls -R
+        working-directory: wheelhouse
+
+      - name: Publish package to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
         with:
           user: __token__
           password: ${{ secrets.PYPI_API_TOKEN }}