Use python 3.12

Author: samwelkanda

.github/workflows/publish.yml

@@ -18,10 +18,10 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
-      - name: Set up Python 3.11
+      - name: Set up Python 3.12
         uses: actions/setup-python@v5
         with:
-          python-version: 3.11
+          python-version: 3.12
       - name: Install flit
         run: |
           pip install flit