[Backport 2.18] Changed the default value of expand for synonym and synonym_graph to true. #677

	name: PR Checklist

	on:
	pull_request_target:
	types: [opened]

	permissions:
	pull-requests: write

	jobs:
	add-checklist:
	runs-on: ubuntu-latest

	steps:
	- name: Comment PR with checklist
	uses: peter-evans/create-or-update-comment@v3
	with:
	token: ${{ secrets.GITHUB_TOKEN }}
	issue-number: ${{ github.event.pull_request.number }}
	body: \|
	Thank you for submitting your PR. The PR states are In progress (or Draft) -> Tech review -> Doc review -> Editorial review -> Merged.

	Before you submit your PR for doc review, make sure the content is technically accurate. If you need help finding a tech reviewer, tag a [maintainer](https://github.com/opensearch-project/documentation-website/blob/main/MAINTAINERS.md).

	When you're ready for doc review, tag the assignee of this PR. The doc reviewer may push edits to the PR directly or leave comments and editorial suggestions for you to address (let us know in a comment if you have a preference). The doc reviewer will arrange for an editorial review.

	- name: Auto assign PR to repo owner
	uses: actions/github-script@v6
	with:
	script: \|
	let assignee = context.payload.pull_request.user.login;
	const prOwners = ['Naarcha-AWS', 'kolchfa-aws', 'vagimeli', 'natebower'];

	if (!prOwners.includes(assignee)) {
	assignee = 'kolchfa-aws'
	}

	github.rest.issues.addAssignees({
	issue_number: context.issue.number,
	owner: context.repo.owner,
	repo: context.repo.repo,
	assignees: [assignee]
	});

Provide feedback