Update actions/checkout action to v4 #51

	# This workflow will build a Java project with Gradle
	# For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-gradle

	name: Java CI with Gradle

	on:
	push:
	branches: [ main ]
	pull_request:
	branches: [ main ]

	jobs:
	build:

	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4
	- name: Set up JDK 11
	uses: actions/setup-java@v2
	with:
	java-version: '11'
	distribution: 'adopt'
	- name: Grant execute permission for gradlew
	run: chmod +x gradlew
	- name: Cache Gradle packages
	uses: actions/cache@v2
	with:
	path: \|
	~/.gradle/caches
	~/.gradle/wrapper
	key: ${{ runner.os }}-gradle-${{ hashFiles('*/.gradle', '*/gradle-wrapper.properties') }}
	restore-keys: \|
	${{ runner.os }}-gradle-
	- name: Build with Gradle
	run: ./gradlew build test
	- name: Cleanup Gradle Cache
	# Remove some files from the Gradle cache, so they aren't cached by GitHub Actions.
	# Restoring these files from a GitHub Actions cache might cause problems for future builds.
	run: \|
	rm -f ~/.gradle/caches/modules-2/modules-2.lock
	rm -f ~/.gradle/caches/modules-2/gc.properties

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