simplify the cmd of pylint

Author: andersoncontreira

.github/workflows/pylint.yml

@@ -38,7 +38,4 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Install dependencies
-        run: |
-          python -m pip install --upgrade pip
-          pip install pylint
-          pylint ./examples/*/app.py ./examples/*/*
+        run: pylint ./examples/*/app.py ./examples/*/*