docs: add `pgfplots` example #272

	on:
	push:
	branches:
	- master
	- develop
	pull_request:
	branches:
	- master
	- develop

	name: Build

	jobs:
	build-xelatex:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	name: checkout code
	- uses: xu-cheng/texlive-action/full@v1
	with:
	run: \|
	latexmk main.tex -halt-on-error -time -xelatex
	name: build with XeLaTeX
	- uses: actions/upload-artifact@v2
	with:
	path: main.pdf
	name: build-xelatex
	name: upload build artifacts
	build-lualatex:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	name: checkout code
	- uses: xu-cheng/texlive-action/full@v1
	with:
	run: \|
	latexmk main.tex -halt-on-error -time -lualatex
	name: build with LuaLaTeX
	- uses: actions/upload-artifact@v2
	with:
	path: main.pdf
	name: build-lualatex
	name: upload build artifacts

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