Override channel priority on installing. Add check for default channel #7010

	name: Lint GitHub Actions

	on:
	pull_request:
	push:
	branches:
	- main

	jobs:
	lint-actions:
	runs-on: ubuntu-20.04
	steps:
	- name: Checkout
	uses: actions/checkout@v3
	- uses: actions/setup-go@v2
	with:
	go-version: '^1.16.0'
	# Lifted from https://github.com/pytorch/pytorch/blob/b39b28ced39f6400c97c1ab663046d765fc95a87/.github/workflows/lint.yml#L189-L200
	- name: Install ShellCheck
	run: \|
	set -x
	scversion="v0.7.2"
	wget -qO- "https://github.com/koalaman/shellcheck/releases/download/${scversion?}/shellcheck-${scversion?}.linux.x86_64.tar.xz" \| tar -xJv
	mkdir -p ~/.local/bin
	cp "shellcheck-${scversion}/shellcheck" ~/.local/bin/
	rm -r "shellcheck-${scversion}"
	~/.local/bin/shellcheck --version
	- name: Install requirements
	run: \|
	set -eux
	go install github.com/rhysd/actionlint/cmd/actionlint@97ad72abf96ba516f4a49f2da567165eaebf7e5a
	- name: Run actionlint
	run: \|
	set -eux
	# Would like to eventually have this in a config file but it's here until then
	actionlint \
	-ignore "SC1090" \
	-ignore 'when a reusable workflow is called with "uses", "strategy" is not available.' \
	-ignore 'reusable workflow cannot be nested.'

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