fix few warnings #282

	name: CI

	on:
	# Runs on pushes targeting the default branch
	push:
	branches: ["master"]

	# Runs on PRs against master.
	pull_request:
	branches:
	- master


	# Allows you to run this workflow manually from the Actions tab
	workflow_dispatch:

	# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
	permissions:
	contents: read
	pages: write
	id-token: write

	# Allow one concurrent deployment
	concurrency:
	group: "pages"
	cancel-in-progress: true

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- name: Install elan
	run: \|
	set -o pipefail
	curl -sSfL https://github.com/leanprover/elan/releases/download/v1.4.2/elan-x86_64-unknown-linux-gnu.tar.gz \| tar xz
	./elan-init -y --default-toolchain none
	echo "$HOME/.elan/bin" >> $GITHUB_PATH
	- name: Checkout
	uses: actions/checkout@v3
	- name: Download cached build
	run: lake exe cache get
	- name: Build SciLean
	run: lake build
	- name: Run Examples
	run: make examples
	- name: Setup Pages
	uses: actions/configure-pages@v2
	- name: Upload artifact
	uses: actions/upload-pages-artifact@v1
	with:
	# Upload entire repository
	path: '.'

	# Single deploy job since we're just deploying
	deploy:
	# only build on `master` branch of the actual remote, NOT on PRs.
	# this stops PRs from attempting to deploy GH pages and failing to do so.
	if: github.ref == 'refs/heads/master' && github.event_name != 'pull_request'
	environment:
	name: github-pages
	url: ${{ steps.deployment.outputs.page_url }}
	runs-on: ubuntu-latest
	needs: build
	steps:
	- name: Deploy to GitHub Pages
	id: deployment
	uses: actions/deploy-pages@v1

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