setup python for linting

Author: kezhenxu94

.github/workflows/CI.yaml

@@ -41,6 +41,10 @@ jobs:
           submodules: true
       - name: Check License
         uses: apache/skywalking-eyes/header@501a28d2fb4a9b962661987e50cf0219631b32ff
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: 3.8
       - name: Lint codes
         run: |
           make poetry