Updated README with online DOI #630

	# This runs documentation testing.

	name: Check documentation

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

	jobs:
	build:

	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 dependencies
	run: \|
	python -m pip install --upgrade pip
	python -m pip install .[docs]
	- name: Checks documentation
	run: \|
	python run-tests.py --doctest

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