build(deps): bump actions/checkout from 2 to 4 #26

	name: style and docs

	on:
	push:
	branches:
	- develop
	- releases/**
	pull_request:
	branches:
	- develop
	- releases/**
	jobs:
	validate:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-python@v2
	with:
	python-version: 3.9
	- name: Install Python Packages
	run: \|
	pip install --upgrade pip
	pip install --upgrade vermin
	- name: Minimum Version (Spack's Core)
	run: vermin --backport argparse --backport typing -t=2.6- -t=3.5- -v lib/spack/spack/ lib/spack/llnl/ bin/
	- name: Minimum Version (Repositories)
	run: vermin --backport argparse --backport typing -t=2.6- -t=3.5- -v var/spack/repos
	style:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0
	- uses: actions/setup-python@v2
	with:
	python-version: 3.9
	- name: Install Python packages
	run: \|
	pip install --upgrade pip six setuptools flake8 mypy>=0.800 black
	- name: Setup git configuration
	run: \|
	# Need this for the git tests to succeed.
	git --version
	. .github/workflows/setup_git.sh
	- name: Run style tests
	run: \|
	share/spack/qa/run-style-tests
	documentation:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-python@v2
	with:
	python-version: 3.9
	- name: Install System packages
	run: \|
	sudo apt-get -y update
	sudo apt-get install -y coreutils ninja-build graphviz
	- name: Install Python packages
	run: \|
	pip install --upgrade pip six setuptools
	pip install --upgrade -r lib/spack/docs/requirements.txt
	- name: Build documentation
	run: \|
	share/spack/qa/run-doc-tests

Provide feedback