Update actions/checkout digest to cbb7224 #311

	#
	# Configuration for GitHub-based CI, based on the stock GitHub Rust config.
	#
	name: Rust

	env:
	RUSTFLAGS: -D warnings

	on:
	push:
	branches: [ main ]
	pull_request:
	# Allow CI to run on all PRs, not just ones targeting main. This allows
	# stacked PRs to be tested.

	jobs:
	check-style:
	runs-on: ubuntu-latest
	steps:
	# actions/checkout@v2
	- uses: actions/checkout@cbb722410c2e876e24abbe8de2cc27693e501dcb
	- uses: actions-rs/toolchain@88dc2356392166efad76775c878094f4e83ff746
	with:
	toolchain: stable
	default: false
	components: rustfmt
	- name: Check style
	run: cargo fmt -- --check
	- name: Check clippy
	run: cargo clippy --all-targets --all-features

	build-and-test:
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	# 1.81 is the MSRV.
	toolchain: [ stable, "1.81" ]
	os: [ ubuntu-latest, macos-latest ]
	steps:
	# actions/checkout@v2
	- uses: actions/checkout@cbb722410c2e876e24abbe8de2cc27693e501dcb
	- uses: dtolnay/rust-toolchain@v1
	with:
	toolchain: ${{ matrix.toolchain }}
	- name: Build
	run: cargo build --tests --verbose
	- name: Run tests
	run: cargo test --verbose

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