fix for re global flags expression #419

	name: antsibull changelog files

	on:
	pull_request:
	branches:
	- master
	- development

	jobs:
	build:
	runs-on: ubuntu-latest
	name: Test changed-files
	steps:
	- uses: actions/checkout@v3
	with:
	fetch-depth: 0

	- name: Get changelog files
	id: changelog-files
	uses: tj-actions/changed-files@v41
	with:
	files: \|
	changelogs/**
	- name: List all changed files
	run: \|
	for file in ${{ steps.changelog-files.outputs.all_changed_files }}; do
	echo "antsibull changelog file found: $file"
	exit 0
	done
	echo "antsibull changelog files missing!"
	exit 1

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