Add PDFs for all versions of GDT #514

	#
	# GitHub Actions Workflow for pull request events to make sure
	# Markdown links are not-broken and Jekyll still builds.
	# If successful, the resulting html files are uploaded as
	# artifacts to make it easier to preview the results of a PR.
	#
	# For more information on the actions used in this workflow, please see:
	# https://github.com/actions/checkout
	# https://github.com/lycheeverse/lychee-action
	# https://github.com/marketplace/actions/build-jekyll
	# https://github.com/actions/upload-artifact
	#
	name: Check markdown links and Jekyll build
	on:
	pull_request:
	types: [opened, synchronize, reopened, edited]
	workflow_dispatch:

	jobs:
	check-markdown-links-build:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v4

	- name: Check markdown links
	uses: lycheeverse/lychee-action@v1
	with:
	fail: true
	format: markdown
	jobSummary: true
	output: ./lychee/results.md
	args: --config .lychee/config.toml './*/.md'
	env:
	GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}} # GitHub API token to use when checking github.com links, to avoid rate limiting

	- name: Build with Jekyll
	uses: actions/jekyll-build-pages@v1

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