revert additional python versions in build matrix

Author: jdidion

.github/workflows/pythonpackage.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        PYTHON_VERSION: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        PYTHON_VERSION: ["3.8", "3.9", "3.10"]
     steps:
     - uses: actions/checkout@v2