Update python-pytest.yml

Author: lixfz

.github/workflows/python-pytest.yml

@@ -21,10 +21,6 @@ jobs:
         os: [windows-latest, ubuntu-latest]
         python-version: ["3.8", "3.9", "3.10"]
         include:
-          - os: ubuntu-20.04
-            python-version: 3.6
-          - os: ubuntu-20.04
-            python-version: 3.7
           - os: ubuntu-latest
             python-version: 3.11