bump up setup-python

Author: hathach

.github/workflows/githubci.yml

@@ -27,7 +27,7 @@ jobs:
 
     steps:
     - name: Setup Python
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@v4
       with:
         python-version: '3.x'
 
@@ -54,7 +54,7 @@ jobs:
     needs: build
     steps:
     - name: Setup Python
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@v4
       with:
         python-version: '3.x'