Fix memory leak in pickle creation #627

	name: Documentation building
	on:
	schedule:
	- cron: '0 0 * * 2'
	push:
	branches:
	- main
	pull_request:
	branches:
	- main
	paths:
	- .github/workflows/docs.yml
	- "atom/**"
	- "docs/**"
	- "examples/**"
	- setup.py
	- pyproject.toml

	jobs:
	docs:
	name: Docs building
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Get history and tags for SCM versioning to work
	run: \|
	git fetch --prune --unshallow
	git fetch --depth=1 origin +refs/tags/:refs/tags/
	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: '3.x'
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install -r docs/requirements.txt
	- name: Install project
	run: \|
	pip install .
	- name: Install graphviz
	uses: ts-graphviz/setup-graphviz@v1
	- name: Build documentation
	# Remove -W till the multiple reference can be fixed in Sphinx 4
	run: \|
	mkdir docs_output;
	sphinx-build docs/source docs_output -b html;

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