Update wheels action

Author: Legrandin

.github/workflows/wheels.yml

@@ -18,7 +18,9 @@ jobs:
           python-version: '3.x'
 
       - name: Build source package (.tar.gz)
-        run: python setup.py sdist
+        run: |
+          python -m pip install setuptools
+          python setup.py sdist
 
       - uses: actions/upload-artifact@v3
         with: