Fix Node.js 12 warning

- Upgrade checkout and setup-python to v3 which use Node.js 16

.github/workflows/pr_compile_scripts.yml

@@ -13,11 +13,11 @@ jobs:
         python-version: [3.8]
     steps:
       - name: Checkout the repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       # Setup python (Windows VM is Python 3.7 by default, we need at least Python 3.8)
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v3
         with:
           python-version: ${{ matrix.python-version }}