add links to RIOT Summit 2022 and 2023 #155

	name: Receive PR

	on:
	pull_request:
	types: [opened, synchronize, reopened]

	jobs:
	build-pr:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v2

	- name: Update RIOT data
	run: make update_riot_data
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

	# Use GitHub Actions' cache to shorten build times and decrease load on servers
	- uses: actions/cache@v2
	with:
	path: vendor/bundle
	key: ${{ runner.os }}-gems-${{ hashFiles('**/Gemfile') }}
	restore-keys: ${{ runner.os }}-gems-

	- name: Build
	uses: jerryjvl/jekyll-build-action@v1

	- name: Save PR number
	run: \|
	mkdir -p ./pr
	echo ${{ github.event.number }} > ./pr/number

	# push build to workflow artifacts
	- uses: actions/upload-artifact@v2
	with:
	name: site
	path: \|
	./_site
	./pr

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