Update actions/checkout action to v4 #3

	# Copyright (C) Nicolas Lamirault <[email protected]>
	#
	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.
	# You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS,
	# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	# See the License for the specific language governing permissions and
	# limitations under the License.
	#
	# SPDX-License-Identifier: Apache-2.0

	name: Jsonnet / Build

	on:
	pull_request:
	branches:
	- master
	push:
	branches:
	- master

	jobs:
	format:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- uses: kobtea/setup-jsonnet-action@v1
	- run: \|
	jb install
	find . -name "*.libsonnet" \| xargs -IFILE bash -c "jsonnetfmt FILE \| diff -u FILE -"

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