Update Sphinx theme #179

	name: Format check

	on:
	push:
	branches:
	- main
	- 'stable/**'
	pull_request:
	branches:
	- main
	- 'stable/**'

	jobs:
	lint:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Set up Python 3.9
	uses: actions/setup-python@v2
	with:
	python-version: '3.9'
	- name: Install tox
	run: \|
	python -m pip install --upgrade pip
	pip install tox
	- name: Run format check
	run: tox -eformat

Provide feedback