workflows/pytest: fix actions versions

Author: miltondp

.github/workflows/pytest.yaml

@@ -21,9 +21,9 @@ jobs:
         os: [ubuntu-latest, macOS-latest, windows-latest]
     steps:
       - name: Checkout git repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
       - name: Install dependencies