Bump actions/checkout from 3 to 4 #4

	name: CI
	on:
	push:
	branches-ignore: [master]
	tags-ignore: [v*]
	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true
	jobs:
	test:
	name: "test (ruby: ${{ matrix.ruby }}, redis.rb: ${{ matrix.redis }})"
	runs-on: ubuntu-latest
	continue-on-error: ${{ contains(matrix.ruby, 'head') }}
	strategy:
	fail-fast: false
	matrix:
	ruby:
	- "2.7"
	- "3.0"
	- "3.1"
	# - 'head'
	- "jruby"
	# - 'jruby-head'
	- "truffleruby"
	# - 'truffleruby-head'
	redis:
	- 4_0_x
	- 4_1_x
	- 4_x
	env:
	BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/redis_${{ matrix.redis }}.gemfile
	services:
	redis:
	image: redis
	ports:
	- 6379:6379
	distributed1:
	image: redis
	ports:
	- 6380:6380
	distributed2:
	image: redis
	ports:
	- 6381:6381
	steps:
	- uses: actions/checkout@v4
	- uses: ruby/setup-ruby@v1
	with:
	ruby-version: ${{ matrix.ruby }}
	bundler-cache: true
	- run: bundle exec rake
	lint:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0
	- uses: ruby/setup-ruby@v1
	with:
	ruby-version: 3.1
	bundler-cache: true
	- run: bundle exec rake lint

Provide feedback