Upgrade actions to v3 in python-publish.yml

Author: nathanw-mlc

.github/workflows/python-publish.yml

@@ -13,9 +13,9 @@ jobs:
     permissions:
       id-token: write
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Set up Python
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v3
       with:
         python-version: '3.x'
     - name: Install dependencies