Silence errors about duplicated upload to TestPyPI

Author: Paweł Stankowski

.github/workflows/publish.yml

@@ -31,6 +31,7 @@ jobs:
       with:
         password: ${{ secrets.TEST_PYPI_TOKEN }}
         repository_url: https://test.pypi.org/legacy/
+        skip_existing: true
     - name: Publish package to PyPI
       if: startsWith(github.ref, 'refs/tags')
       uses: pypa/gh-action-pypi-publish@master