BCF-2877: support mercury loopp #54659

	#
	# This action checks PRs to see if any CHANGELOG* files were updated.
	# If none were, it will add a message to the PR asking if it would make sense to do so.
	#
	name: Changelog

	on: pull_request

	jobs:
	changelog:
	# For security reasons, GITHUB_TOKEN is read-only on forks, so we cannot leave comments on PRs.
	# This check skips the job if it is detected we are running on a fork.
	if: ${{ github.event.pull_request.head.repo.full_name == 'smartcontractkit/chainlink' }}
	name: Changelog checker
	runs-on: ubuntu-latest
	steps:
	- name: Check for changed files
	id: changedfiles
	uses: umani/changed-files@d7f842d11479940a6036e3aacc6d35523e6ba978 # Version 4.1.0
	with:
	repo-token: ${{ secrets.GITHUB_TOKEN }}
	pattern: '^docs/CHANGELOG.*$'
	- name: Make a comment
	uses: unsplash/comment-on-pr@ffe8f97ccc63ce12c3c23c6885b169db67958d3b # Version 1.3.0
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	if: contains(steps.changedfiles.outputs.files_updated, 'CHANGELOG') != true && contains(steps.changedfiles.outputs.files_created, 'CHANGELOG') != true
	with:
	msg: "I see that you haven't updated any CHANGELOG files. Would it make sense to do so?"
	check_for_duplicate_msg: true
	- name: Collect Metrics
	if: always()
	id: collect-gha-metrics
	uses: smartcontractkit/push-gha-metrics-action@0281b09807758be1dcc41651e44e62b353808c47 # v2.1.0
	with:
	org-id: ${{ secrets.GRAFANA_INTERNAL_TENANT_ID }}
	basic-auth: ${{ secrets.GRAFANA_INTERNAL_BASIC_AUTH }}
	hostname: ${{ secrets.GRAFANA_INTERNAL_HOST }}
	this-job-name: Changelog checker
	continue-on-error: true

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