chore: gh-actions, run non-code actions against python 3.12

Author: mbi

.github/workflows/test.yml

@@ -50,7 +50,7 @@ jobs:
       max-parallel: 4
       matrix:
         python-version:
-          - '3.9'
+          - '3.12'
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -95,7 +95,7 @@ jobs:
       max-parallel: 4
       matrix:
         python-version:
-          - '3.9'
+          - '3.12'
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -117,7 +117,7 @@ jobs:
       max-parallel: 4
       matrix:
         python-version:
-          - '3.9'
+          - '3.12'
     steps:
       - name: Checkout
         uses: actions/checkout@v4