README: fix build status badge #199

	name: build
	on:
	push:
	branches:
	- main
	tags:
	- '**'
	pull_request:
	schedule:
	# build it monthly: At 05:00 on day-of-month 1.
	- cron: '0 5 1 * *'
	workflow_dispatch:

	jobs:
	build:
	runs-on: ubuntu-latest
	continue-on-error: false
	if: ${{ !contains(github.event.head_commit.message, '[skip ci]') }}
	steps:
	- uses: actions/checkout@v4
	- uses: actions/cache@v4
	with:
	path: \|
	~/.m2/repository
	~/.cache
	key: ${{ runner.os }}-${{ hashFiles('**/pom.xml') }}
	restore-keys: \|
	${{ runner.os }}-
	- name: Set up Ruby 3.3
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: 3.3
	- name: Setup Environment
	shell: bash
	run: \|
	echo "LANG=en_US.UTF-8" >> $GITHUB_ENV
	echo "MAVEN_OPTS=-Dmaven.wagon.httpconnectionManager.ttlSeconds=180 -Dmaven.wagon.http.retryHandler.count=3" >> $GITHUB_ENV
	echo "PMD_CI_SCRIPTS_URL=https://raw.githubusercontent.com/pmd/build-tools/26/scripts" >> $GITHUB_ENV
	- name: Check Environment
	shell: bash
	run: \|
	f=check-environment.sh; \
	mkdir -p .ci && \
	( [ -e .ci/$f ] \|\| curl -sSL "${PMD_CI_SCRIPTS_URL}/$f" > ".ci/$f" ) && \
	chmod 755 .ci/$f && \
	.ci/$f
	- name: Build
	run: .ci/build.sh
	shell: bash
	env:
	PMD_CI_SECRET_PASSPHRASE: ${{ secrets.PMD_CI_SECRET_PASSPHRASE }}
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

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