update CI action versions

Author: purarue

.github/workflows/ci.yaml

@@ -14,9 +14,9 @@ jobs:
         python-version: [3.8, 3.9, "3.10", "3.11", "3.12"]
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
       - name: Install packages