Bump actions for python.

Author: dajiaji

.github/workflows/python-package.yml

@@ -19,8 +19,8 @@ jobs:
         python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
 
     steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-python@v2
+    - uses: actions/checkout@v4
+    - uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
 
@@ -45,8 +45,8 @@ jobs:
         os: [ubuntu-latest, windows-latest, macos-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"