Style: Modernize yaml formatting & syntax #1336

	name: 🌌 Test Build

	on: [pull_request]

	# Make sure jobs cannot overlap (e.g. one from push and one from schedule).
	concurrency:
	group: pr-${{github.actor}}-${{github.head_ref \|\| github.run_number}}-${{github.ref}}-ci
	cancel-in-progress: true

	jobs:
	build:
	name: Build sources from the PR branch
	runs-on: ubuntu-latest

	steps:
	- name: Checkout
	uses: actions/checkout@v4
	with:
	submodules: recursive

	# Configure the build environment.
	- name: Install Ruby 3.1
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: 3.1
	# Runs 'bundle install' and caches installed gems automatically.
	bundler-cache: true

	- name: Install Minify
	run: sudo apt-get update && sudo apt-get install minify

	# Build the website.
	- name: Build the static website
	run: bundle exec jekyll build

	# Upload resulting "_site" directory as artifact.
	- uses: actions/upload-artifact@v4
	with:
	name: site
	path: _site/

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