fix old version

.github/workflows/main.yml

@@ -64,13 +64,8 @@ jobs:
           with:
             fetch-depth: 0
 
-        - name: Set up Python 3.7
-          uses: actions/setup-python@v1
-          with:
-            python-version: 3.7
-
-        - name: Set up Python 3.8
-          uses: actions/setup-python@v1
+        - name: Set up Python
+          uses: actions/setup-python@v4
           with:
             python-version: 3.8