adding matrix build for 3.10 and 3.11

Author: dalager

.github/workflows/python-app.yml

@@ -12,13 +12,16 @@ permissions:
 jobs:
   build:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [3.10, 3.11, 3.12]
 
     steps:
       - uses: actions/checkout@v4
-      - name: Set up Python 3.12
+      - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v3
         with:
-          python-version: "3.12"
+          python-version: ${{ matrix.python-version }}
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip