Correct tag for pypi publishing action

.github/workflows/pypi_publish.yml

@@ -29,7 +29,7 @@ jobs:
     # We do this, since failures on test.pypi aren't that bad
     - name: Publish to Test PyPI
       if: startsWith(github.event.ref, 'refs/tags') || github.event_name == 'release'
-      uses: pypa/gh-action-pypi-publish@v1
+      uses: pypa/gh-action-pypi-publish@release/v1
       with:
         user: __token__
         password: ${{ secrets.TEST_PYPI_API_TOKEN }}