[Backport 2.x] Add github workflow to auto bump bwc version #1480

	##
	# Copyright OpenSearch Contributors
	# SPDX-License-Identifier: Apache-2.0
	##

	name: Link Checker

	on:
	push:
	pull_request:

	jobs:
	linkchecker:

	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v2
	- name: lychee Link Checker
	id: lychee
	uses: lycheeverse/lychee-action@master
	with:
	args: --accept=200,403,429 "*/.html" "*/.md" "*/.txt"
	env:
	GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
	- name: Fail if there were link errors
	run: exit ${{ steps.lychee.outputs.exit_code }}

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