Use python 3.12

Author: samwelkanda

.github/workflows/publish.yml

@@ -23,7 +23,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: '3.8'
+          python-version: '3.12'
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip