Update pythonpackage.yml

Author: ahnitz

.github/workflows/pythonpackage.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.7, 3.8, 3.9, '3.10', '3.11']
+        python-version: ['3.11', '3.12']
 
     steps:
     - uses: actions/checkout@v2