Update README.md #273

	name: Sphinx documentation

	on:
	pull_request:
	types: [opened, synchronize, reopened]
	push:
	workflow_dispatch:

	jobs:
	build-html-docs:
	name: 'Build HTML docs'
	runs-on: 'ubuntu-24.04'
	strategy:
	matrix:
	python-version: ['3.11', '3.12']
	defaults:
	run:
	working-directory: './docs'
	steps:
	- name: Check out Forest code
	uses: actions/checkout@v4
	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install documentation build dependencies
	run: pip install -r requirements.txt
	- name: Build HTML docs
	run: make html SPHINXOPTS="-W"

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