Add new gravity tutorial to the list #21

	name: Check style

	on:
	# Check style after every push to main
	push:
	branches:
	- main
	# Check style on every PR
	pull_request:

	jobs:

	style:
	runs-on: ubuntu-latest
	env:
	PYTHON: "3.12"

	steps:
	- name: Checkout repo
	uses: actions/checkout@v4

	- name: Setup Python
	uses: actions/setup-python@v5
	with:
	python-version: ${{ env.PYTHON }}

	- name: Install required packages
	run: pip install ruff nbqa

	- name: Check style of notebooks
	run: make check

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