Update python-app.yml - Ruff only

.github/workflows/python-app.yml

@@ -26,7 +26,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+        # if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
         pip install ruff
     - name: Lint with ruff
       run: |