Update test action.

.github/workflows/python-app.yml

@@ -13,19 +13,29 @@ on:
     - cron: '0 12 * * *'
 
 jobs:
-  build:
-
-    runs-on: ubuntu-20.04  # keep it on 20.04 to have Python 3.5 and 3.6 available
+  test:
+    name: Run tests on ${{ matrix.py }}
+    runs-on: ubuntu-20.04  # keep it on 20.04 to have Python 3.6 available
     strategy:
       matrix:
-        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10", "3.11", "3.12-dev"]
+        py:
+          - "3.12.0-beta.4"
+          - "3.11"
+          - "3.10"
+          - "3.9"
+          - "3.8"
+          - "3.7"
+          - "3.6"
+          - "pypy-3.9"
+          - "pypy-3.8"
+          - "pypy-3.7"
 
     steps:
     - uses: actions/checkout@v3
-    - name: Set up Python ${{ matrix.python-version }}
+    - name: Set up Python ${{ matrix.py }}
       uses: actions/setup-python@v4
       with:
-        python-version: ${{ matrix.python-version }}
+        python-version: ${{ matrix.py }}
         check-latest: true
     - name: Install dependencies
       run: |