[CI] Updates STACK_VERSION for 8.x compatiblity tests #80

	name: 7.x with 8.x
	on:
	push:
	branches:
	- 7.17
	pull_request:
	branches:
	- 7.17
	jobs:
	test-ruby:
	env:
	TEST_ES_SERVER: http://localhost:9250
	PORT: 9250
	strategy:
	fail-fast: false
	matrix:
	ruby: [ '3.2' ]
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Increase system limits
	run: \|
	sudo swapoff -a
	sudo sysctl -w vm.swappiness=1
	sudo sysctl -w fs.file-max=262144
	sudo sysctl -w vm.max_map_count=262144
	- uses: elastic/elastic-github-actions/elasticsearch@master
	with:
	stack-version: 8.9-SNAPSHOT
	security-enabled: false
	- uses: ruby/setup-ruby@v1
	with:
	ruby-version: ${{ matrix.ruby }}
	- name: Build and test with Rake
	run: \|
	sudo apt-get update
	sudo apt-get install libcurl4-openssl-dev
	ruby -v
	rake bundle:clean
	rake bundle:install
	- name: elasticsearch
	run: cd elasticsearch && bundle exec rake test:all

Provide feedback