matrix tests for 3.10-3.12

.github/workflows/django-test.yml

@@ -9,14 +9,17 @@ jobs:
   build:
 
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.10", "3.11", "3.12"]
 
     steps:
     - name: Checkout
       uses: actions/checkout@v4
     - name: Set up Python
       uses: actions/setup-python@v3
       with: 
-        python-version: '3.11'
+        python-version: ${{ matrix.python-version }}
     - name: Install Poetry
       run: |
         python -m pip install --upgrade pip