Bump actions/checkout from 4.1.0 to 4.1.1 #4838

	name: doc

	on: [push, pull_request]

	permissions:
	contents: read

	jobs:
	build:
	# Use Ubuntu 20.04 because doxygen 1.8.13 from Ubuntu 18.04 is broken.
	runs-on: ubuntu-20.04

	steps:
	- uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1

	- name: Add ubuntu mirrors
	run: \|
	# Github Actions caching proxy is at times unreliable
	# see https://github.com/actions/runner-images/issues/7048
	printf 'http://azure.archive.ubuntu.com/ubuntu\tpriority:1\n' \| sudo tee /etc/apt/mirrors.txt
	curl http://mirrors.ubuntu.com/mirrors.txt \| sudo tee --append /etc/apt/mirrors.txt
	sudo sed -i 's~http://azure.archive.ubuntu.com/ubuntu/~mirror+file:/etc/apt/mirrors.txt~' /etc/apt/sources.list

	- name: Create Build Environment
	run: \|
	sudo apt update
	sudo apt install doxygen python3-virtualenv
	sudo npm install -g less clean-css
	cmake -E make_directory ${{runner.workspace}}/build

	- name: Build
	working-directory: ${{runner.workspace}}/build
	env:
	KEY: ${{secrets.KEY}}
	run: $GITHUB_WORKSPACE/support/build-docs.py

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