Skip existing nightly uploads

Fixes #3494

Author: Goran Jelic-Cizmek

.github/workflows/wheels-nightly.yml

@@ -97,3 +97,5 @@ jobs:
           path: dist/
       - name: Publish package distributions to PyPI
         uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          skip-existing: true