Add missing ctx variable in the func main() in the "introduction to acceptance tests" chapter #443

	name: Go

	on:
	push:
	branches: [ main ]
	pull_request:
	branches: [ main ]
	release:
	types: [ published ]

	jobs:

	build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2

	- name: Set up Go
	uses: actions/setup-go@v2
	with:
	go-version: 1.18

	- name: Build
	run: ./build.sh

	- name: Build books
	run: ./build.books.sh

	- name: Get release
	id: get_release
	if: github.event_name == 'release' && github.event.action == 'published'
	uses: bruceadams/[email protected]
	env:
	GITHUB_TOKEN: ${{ github.token }}

	- name: Attach generated epub upon release publish
	if: github.event_name == 'release' && github.event.action == 'published'
	with:
	upload_url: ${{ steps.get_release.outputs.upload_url }}
	asset_path: ./learn-go-with-tests.epub
	asset_name: learn-go-with-tests.epub
	asset_content_type: application/epub+zip
	uses: actions/[email protected]
	env:
	GITHUB_TOKEN: ${{ github.token }}

	- name: Attach generated PDF upon release publish
	if: github.event_name == 'release' && github.event.action == 'published'
	with:
	upload_url: ${{ steps.get_release.outputs.upload_url }}
	asset_path: ./learn-go-with-tests.pdf
	asset_name: learn-go-with-tests.pdf
	asset_content_type: application/pdf
	uses: actions/[email protected]
	env:
	GITHUB_TOKEN: ${{ github.token }}

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