Bump actions/checkout to v4 #190

	# ref: https://github.com/actions/runner-images
	name: amd64 MacOS Bazel

	on:
	push:
	pull_request:
	schedule:
	# min hours day(month) month day(week)
	- cron: '0 0 7,22 * *'

	jobs:
	# Building using the github runner environement directly.
	bazel:
	runs-on: macos-13 # Using x86 processors, ref: https://github.com/actions/runner-images
	steps:
	- name: Check out repository code
	uses: actions/checkout@v4
	- name: Install Bazel
	run: \|
	brew update
	brew unlink bazelisk
	brew install bazel
	- name: Check Bazel
	run: bazel version
	- name: Build
	run: >
	bazel build
	-c opt
	--subcommands=true
	...
	- name: Test
	run: >
	bazel test
	-c opt
	--test_output=errors
	...

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