docs: corrected from_pickle returns type #335

	# Fixing OS version to avoid breaking OS changes during development stage.
	# Will open up OS versions before release.

	name: "Render docs"

	on: push

	env:
	PYTHON_VERSION: "3.9"
	PUSH_BRANCH: "refs/heads/dev"

	jobs:
	build:
	name: Sphinx
	runs-on: ubuntu-22.04
	permissions:
	contents: write
	steps:
	- uses: actions/checkout@v3
	- name: Set up Python ${{ env.PYTHON_VERSION }}
	uses: actions/setup-python@v3
	with:
	python-version: ${{ env.PYTHON_VERSION }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
	- name: Sphinx build # use -W to turn warnings into errors
	run: \|
	make -C docs/ html SPHINXOPTS="-W"
	- name: Deploy
	uses: peaceiris/actions-gh-pages@v3
	# deploy if it's being pushed only to this branch
	if: ${{ github.ref == env.PUSH_BRANCH }}
	with:
	github_token: ${{ secrets.GITHUB_TOKEN }}
	publish_dir: docs/build/html
	commit_message: ${{ github.event.head_commit.message }}

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