Fix Node.js 16 deprecation warning. Ref: https://github.com/actions/setup-python

Author: cc-wong

.github/workflows/main.yml

@@ -14,9 +14,9 @@ jobs:
         uses: actions/checkout@v4
       -
         name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
-          python-version: '3.x'
+          python-version: '3.11.7'
       -
         name: Install dependencies
         run: |