CI publish potential fix

pypa/gh-action-pypi-publish#112

Author: albertz

.github/workflows/publish.yml

@@ -39,7 +39,7 @@ jobs:
 
     # https://github.com/marketplace/actions/pypi-publish
     - name: Publish to PyPI
-      uses: pypa/gh-action-pypi-publish@release/v1.5
+      uses: pypa/gh-action-pypi-publish@unstable/v1
       with:
         user: __token__
         password: ${{ secrets.pypi_password }}