exclude .ipynb files

.github/workflows/lint.yml

@@ -25,6 +25,6 @@ jobs:
           github_token: ${{ secrets.github_token }}
           # Enable linters
           black: true
-          black_args: "-l 99 --diff --color"
+          black_args: "-l 99 --diff --color --extend-exclude \.ipynb"
           flake8: true
           flake8_args: "--max-line-length=99 --extend-ignore=E203,E501"