Remove 3.10, add 3.12

Ubuntu 22.04 is the only one with 3.10, we replace that with 24.04
which uses 3.12

.github/workflows/ci.yaml

@@ -48,7 +48,11 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python_version: ["3.6", "3.9", "3.10", "3.11"]
+        # 3.6: SLE15
+        # 3.9: RHEL/Centos/Liberty 9
+        # 3.11: Tumbleweed
+        # 3.12 Ubuntu 24.04
+        python_version: ["3.6", "3.9", "3.11", "3.12"]
     container:
       image: registry.suse.com/bci/python:${{ matrix.python_version }}
     steps:
@@ -137,14 +141,14 @@ jobs:
             os_version: 15.4
 
     steps:
+      - name: Set up Python
+        uses: actions/setup-python@v5
       - name: Clean up disk space to maximize available space
         run: sudo rm -rf /usr/local/lib/android /usr/share/dotnet /opt/ghc /opt/hostedtoolcache/CodeQL && sudo docker image prune --all --force
       - name: checkout source code
         uses: actions/checkout@v4
       - name: Install tox
         run: sudo apt update && sudo apt install tox
-      - name: Set up Python
-        uses: actions/setup-python@v5
         with:
           python-version: '3.x'