[CI] Revert upload-artifact action

Author: jfowkes

.github/workflows/build_wheels.yml

@@ -62,7 +62,7 @@ jobs:
           CIBW_TEST_REQUIRES: numpy
           CIBW_TEST_COMMAND: python {project}/tests/test_multistart.py
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v3
         with:
           path: ./wheelhouse/*.whl
 
@@ -75,7 +75,7 @@ jobs:
       - name: Build sdist
         run: pipx run build --sdist
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v3
         with:
           path: dist/*.tar.gz