Upgrade some doc dependencies to allow build #45

	name: Docs

	on: [pull_request]

	jobs:
	docs:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: [ "3.9" ]
	poetry-version: [ "1.2.1" ]
	steps:
	# ======
	# Checkout, set up python
	# ======
	- name: Check out
	uses: actions/checkout@v4
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}
	# ======
	# Install and configure poetry from cache
	# ======
	- name: Load cached Poetry installation
	id: cached-poetry
	uses: actions/cache@v4
	with:
	path: ~/.local # the path depends on the OS
	key: poetry-${{ matrix.poetry-version }}
	- name: Install poetry
	if: steps.cached-poetry.outputs.cache-hit != 'true'
	uses: snok/install-poetry@v1
	with:
	version: ${{ matrix.poetry-version }}
	virtualenvs-create: true
	virtualenvs-in-project: true
	# ======
	# Load cached venv if cache exists
	# Install dependencies if cache does not exist
	# ======
	- name: Load cached venv
	id: cached-poetry-dependencies-docs
	uses: actions/cache@v4
	with:
	path: .venv
	key: docs-${{ matrix.python-version }}-${{ matrix.poetry-version }}-${{ hashFiles('**/poetry.lock') }}
	- name: Install dependencies
	if: steps.cached-poetry-dependencies.outputs.cache-hit != 'true'
	run: poetry install --no-interaction -E docs
	# ======
	# Install Pandoc
	# ======
	- name: Use pandoc (external to Poetry)
	uses: nikeee/setup-pandoc@v1
	# uses: docker://pandoc/latex:2.9
	- run: pip install pandoc
	# ======
	# Run test suite
	# ======
	- name: Make docs
	run: poetry run sphinx-build docs docs/_build

Provide feedback