Add GitHub action to publish 2.1 ED updates (#4180) #1

	name: Push 2.1 ED to gh-pages branch

	# Reference documentation: https://docs.github.com/en/actions/reference

	# See https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#onpushpull_requestbranchestags
	on:
	push:
	branches: [WCAG-2.1]

	jobs:
	main:
	name: deploy
	runs-on: ubuntu-20.04
	steps:
	- name: Checkout the repository
	uses: actions/checkout@v4
	with:
	ref: WCAG-2.1
	- name: Checkout gh-pages
	uses: actions/checkout@v4
	with:
	ref: gh-pages
	path: _site
	token: ${{ secrets.W3CGRUNTBOT_TOKEN }}
	- name: Build
	run: \|
	cp guidelines/guidelines.css guidelines/relative-luminance.html _site/guidelines
	curl https://labs.w3.org/spec-generator/?type=respec"&"url=https://raw.githack.com/$GITHUB_REPOSITORY/WCAG-2.1/guidelines/index.html -o _site/guidelines/index.html -f --retry 3
	- name: Push
	uses: stefanzweifel/git-auto-commit-action@v5
	with:
	repository: _site
	branch: gh-pages
	commit_user_name: w3cgruntbot
	commit_user_email: [email protected]
	commit_author: "w3cgruntbot <[email protected]>"
	commit_message: ":robot: Deploy to GitHub Pages: ${{ github.sha }} from branch ${{ github.ref }}"
	skip_fetch: true
	skip_checkout: true

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