test(pytest.yml): simplify test array

The scope of pytest checks is constrained to a latest GitHub
runner for (Ubuntu, Windows, MacOS) and (Python 3.10, 3.13).

Signed-off-by: Norwid Behrnd <nbehrnd@yahoo.com>

Author: nbehrnd

.github/workflows/pytest.yml

@@ -23,9 +23,9 @@ jobs:
       matrix:
         # for a factorial test, an explicit selection of GitHUb runner images
         # https://github.com/actions/runner-images?tab=readme-ov-file#available-images
-        # state of commit 23478d3 as visited on 2024-11-11 Mon
-        os: [ubuntu-22.04,ubuntu-24.04, windows-2019, windows-2022, macos-14]
-        python-version: ["3.10", "3.12", "3.13"]
+        # state of commit 310e8e9 as visited on 2025-05-02 Fri
+        os: [ubuntu-24.04, macos-15, windows-2025]
+        python-version: ["3.10", "3.13"]
     runs-on: ${{ matrix.os }}
 
     timeout-minutes: 5  # Timeout for each job individually