Bump GitHub Actions

.github/workflows/ci.yaml

@@ -7,17 +7,17 @@ jobs:
 
     steps:
       - name: Check out repository code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Setup Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v5
         with:
           python-version: "3.x"
 
       - name: Install dependencies
         run: |
           python3 -m pip install pytest lark-parser
-          
+
       - name: Run test suite
         run: |
           pytest