Fix YAML syntax for Python version specification

Author: jreynard-code

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

@@ -24,7 +24,7 @@ jobs:
     - name: Set up Python 3.10
       uses: actions/setup-python@v1
       with:
-        python-version: 3.10
+        python-version: '3.10'
     - name: Install pypa/build
       run: >-
         python -m