change loading in differential expression chapter #1056

	name: Build book

	on: [push, pull_request]

	jobs:
	build-book:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3

	- name: Set up Python 3.10
	uses: actions/setup-python@v4
	with:
	python-version: "3.10"

	- name: Setup environment
	run: pip install --upgrade jupyter-book jupytext beautifulsoup4

	- name: Cache jupyter-cache folder
	uses: actions/cache@v2
	env:
	cache-name: jupyter-cache
	with:
	path: jupyter-book/_build/.jupyter_cache
	key: v1-${{ github.ref }}-${{ hashFiles('notebook_scripts/*/.py') }}
	restore-keys: \|
	v1-${{ github.ref }}-${{ hashFiles('notebook_scripts/*/.py') }}
	v1-${{ github.ref }}
	v1-refs/heads/master

	- name: Build the JupyterBook
	run: make

	pdfhtml:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v3

	- name: Set up Python 3.10
	uses: actions/setup-python@v4
	with:
	python-version: "3.10"

	- name: Install Python dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install jupyter-book jupytext beautifulsoup4

	- name: Install Headless Chrome dependencies
	run: \|
	sudo apt-get update
	sudo apt-get install -yq $(cat .github/workflows/pyppeteer_requirements.txt)

	- name: Install Chromium
	run: pip install pyppeteer

	- name: Build PDF from HTML (Docs)
	run: make pdf

	- uses: actions/upload-artifact@v3
	with:
	name: PDF_HTML
	path: jupyter-book/_build/pdf/book.pdf

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