Update upload-artifact to v4 #323

	name: Docs CI

	on:
	push:
	pull_request:

	jobs:
	build:
	runs-on: ubuntu-latest
	# Conatiner from ghcr
	container:
	image: ghcr.io/pandablocks/pandablocks-dev-container:latest
	credentials:
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}
	volumes:
	- ${{ github.workspace }}:/repos
	- ${{ github.workspace }}/build:/build

	steps:
	# Git repositories
	- name: Checkout Source
	uses: actions/checkout@v2
	with:
	path: PandABlocks-rootfs
	# require history to get back to last tag for version number of branches
	fetch-depth: 0

	# Build docs inside the container
	- name: build docs
	run: \|
	cd PandABlocks-rootfs
	ln -s CONFIG.example CONFIG
	make docs

	- name: Move to versioned directory
	# e.g. master or 0.1.2
	run: mv build/PandA-rootfs-zynq/build/html "PandABlocks-rootfs/.github/pages/${GITHUB_REF##*/}"

	- name: Publish Docs to gh-pages
	# Only master and tags are published
	if: "${{ github.repository_owner == 'PandABlocks' && (github.ref == 'refs/heads/master' \|\| startsWith(github.ref, 'refs/tags')) }}"
	# We pin to the SHA, not the tag, for security reasons.
	# https://docs.github.com/en/free-pro-team@latest/actions/learn-github-actions/security-hardening-for-github-actions#using-third-party-actions
	uses: peaceiris/actions-gh-pages@bbdfb200618d235585ad98e965f4aafc39b4c501 # v3.7.3
	with:
	github_token: ${{ secrets.GITHUB_TOKEN }}
	publish_dir: PandABlocks-rootfs/.github/pages
	keep_files: true

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