ci: build source dist with wheels (maybe? this sucks)

Author: dhdaines

.github/workflows/build_wheels.yml

@@ -15,8 +15,8 @@ jobs:
 
       - name: Source distribution
         run: |
-          pip install build
-          python -m build -s
+          pip3 install build
+          python3 -m build -s
           
       - name: Build wheels
         uses: pypa/[email protected]