Try to fix python build by using setup-python@v4

.github/workflows/merge-gate.yml

@@ -139,7 +139,7 @@ jobs:
         sudo apt-get install cmake-data cmake    
     - uses: actions/checkout@v3
     - name: Set up Python 3.8
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@v4
       with:
         python-version: 3.8
     - name: Add conda to system path