Update Python version of CI to 3.9 (#41)

Author: zinwang

.github/workflows/testQuarkScript.yml

@@ -20,10 +20,10 @@ jobs:
         git clone https://github.com/quark-engine/quark-engine.git
       
         
-    - name: Set up Python 3.8
+    - name: Set up Python 3.9
       uses: actions/setup-python@v4
       with:
-        python-version: 3.8
+        python-version: 3.9
         cache: pip
         cache-dependency-path: quark-engine/setup.py