refactor: update test-python.yml

.github/workflows/test-python.yml

@@ -9,16 +9,19 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v2
+        working-directory: ./app
 
       - name: Set up Python
         uses: actions/setup-python@v2
         with:
           python-version: '3.12'
 
       - name: Install dependencies
+        working-directory: ./app
         run: |
           python -m pip install --upgrade pip
           pip install -r requirements.txt
 
       - name: Run tests
+        working-directory: ./app
         run: python ./src/run_tests.py