Bump first-party actions used in CI workflows

Suppress warnings about Node.js 16 deprecation.

- actions/checkout v3 → v4
- actions/setup-python v4 → v5

.github/workflows/pytest.yaml

@@ -51,14 +51,12 @@ jobs:
     # name: ${{ matrix.os }}-py${{ matrix.python-version }}-pandas${{ matrix.pandas-version }}
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: ${{ env.depth }}
+        fetch-tags: true
 
-    - name: Fetch tags (for setuptools-scm)
-      run: git fetch --tags --depth=${{ env.depth }}
-
-    - uses: actions/setup-python@v4
+    - uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
         cache: pip
@@ -135,8 +133,8 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
-    - uses: actions/setup-python@v4
+    - uses: actions/checkout@v4
+    - uses: actions/setup-python@v5
       with:
         python-version: "3.x"