ci: update flake8 linting configuration to include max line length and exclude tutorials

Author: sergioburdisso

.github/workflows/ci.yml

@@ -31,7 +31,7 @@ jobs:
       - name: Lint with flake8
         run: |
           pip install flake8
-          flake8 --ignore=W503
+          flake8 --ignore=W503 --max-line-length=120 --exclude=./tutorials/
 
       - name: Run tests with pytest and coverage
         run: |