Update Python version in publish workflow

Author: eadwinCode

.github/workflows/publish.yml

@@ -13,7 +13,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v6
         with:
-          python-version: 3.9
+          python-version: '3.12'
       - name: Install Flit
         run: pip install flit
       - name: Install Dependencies
@@ -28,3 +28,4 @@ jobs:
           password: ${{ secrets.PYPI_API_TOKEN }}
       - name: Deploy Documentation
         run: make doc-deploy
+