Update python-publish.yml

Author: raoulcollenteur

.github/workflows/python-publish.yml

@@ -22,6 +22,8 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install setuptools wheel twine
+    - name: Build package
+      run: python -m build
     - name: Upload Python Package
       uses: pypa/gh-action-pypi-publish@27b31702a0e7fc50959f5ad993c78deac1bdfc29
       with: