[Internal] Add workflow to validate NEXT_CHANGELO.go updates #20

	name: Check for NEXT_CHANGELOG.md Changes

	on:
	pull_request: # Trigger on pull request events

	jobs:
	check-next-changelog:
	runs-on:
	group: databricks-deco-testing-runner-group
	labels: ubuntu-latest-deco

	steps:
	- name: Checkout code
	uses: actions/checkout@v3

	- name: Fetch list of changed files
	id: changed-files
	env:
	GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	run: \|
	# Use the GitHub API to fetch changed files
	files=$(gh pr view ${{ github.event.pull_request.number }} --json files -q '.files[].path')

	# Setting the 'files' environment variable in GitHub Actions
	echo "files<<EOF" >> $GITHUB_ENV
	echo "$files" >> $GITHUB_ENV
	echo "EOF" >> $GITHUB_ENV

	- name: Verify NEXT_CHANGELOG.md was modified
	run: \|
	# Check if NEXT_CHANGELOG.md exists in the list of changed files
	echo "Changed files: $files"
	if [[ ! "$files" =~ NEXT_CHANGELOG\.md ]]; then
	echo "WARNING: file NEXT_CHANGELOG.md not modified in this PR.\
	This is just a reminder and does not block the PR from merging."
	exit 1
	fi

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