upgraded ci codestyle python version

Author: eadwinCode

.github/workflows/test_full.yml

@@ -32,7 +32,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: 3.9
       - name: Install Flit
         run: pip install flit
       - name: Install Dependencies