Python version fix for workflow

.github/workflows/publish-to-test-pypi.yml

@@ -14,7 +14,7 @@ jobs:
     - name: Set up Python 3.10
       uses: actions/setup-python@v2
       with:
-        python-version: 3.10
+        python-version: "3.10"
     - name: Install dependencies
       run: python -m pip install -U setuptools wheel build
     - name: Build a binary wheel and a source tarball