Add python 3.12 to test targets

Author: m0rl

.github/workflows/build.yaml

@@ -13,6 +13,7 @@ jobs:
           - python-version: 3.9
           - python-version: "3.10"
           - python-version: "3.11"
+          - python-version: "3.12"
     env:
       PYTHON: ${{ matrix.python-version }}
     steps: