Expand Python testing to Python 3.12

Python 3.12 was released October 2nd.

No effects were observed on Make-managed files.

References:
* https://peps.python.org/pep-0693/#release-schedule

Signed-off-by: Alex Nelson <[email protected]>

Author: ajnelson-nist

.github/workflows/cicd.yml

@@ -37,7 +37,7 @@ jobs:
       matrix:
         python-version: 
           - '3.9'
-          - '3.11'
+          - '3.12'
 
     steps:
     - uses: actions/checkout@v3