Bump actions/checkout,setup-python to v4.

Author: dajiaji

.github/workflows/python-publish.yml

@@ -10,8 +10,8 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-python@v2
+    - uses: actions/checkout@v4
+    - uses: actions/setup-python@v4
       with:
         python-version: "3.10"