Follow pypa/gh-action-pypi-publish#83.

Author: Julian

.github/workflows/ci.yml

@@ -175,7 +175,7 @@ jobs:
         path: dist
     - name: Publish package
       if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
-      uses: pypa/gh-action-pypi-publish@master
+      uses: pypa/gh-action-pypi-publish@release/v1
       with:
         user: __token__
         password: ${{ secrets.pypi_password }}