Update Python version in CI workflow to 3.12

Author: pgleeson

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [ "3.10" , "3.11" ]
+        python-version: [ "3.10" , "3.12" ]
 
     steps:
     - uses: actions/checkout@v4