Use github supported python version

.github/workflows/pytest.yml

@@ -16,10 +16,10 @@ jobs:
 
     steps:
     - uses: actions/checkout@v3
-    - name: Set up Python 3.8.13
+    - name: Set up Python 3.8.12
       uses: actions/setup-python@v3
       with:
-        python-version: "3.8.13"
+        python-version: "3.8.12"
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip