[Backport][8.7][CI] Updates certificates, validation mode #13

	name: 8.7
	on:
	push:
	branches:
	- 8.7
	pull_request:
	branches:
	- 8.7
	jobs:
	test-main:
	env:
	TEST_ES_SERVER: http://localhost:9250
	PORT: 9250
	strategy:
	fail-fast: false
	matrix:
	ruby: [ '2.7', '3.0', '3.1', '3.2', 'jruby-9.3', 'jruby-9.4' ]
	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: 8.7-SNAPSHOT
	security-enabled: false
	- uses: ruby/setup-ruby@v1
	with:
	ruby-version: ${{ matrix.ruby }}
	- name: Build
	run: \|
	sudo apt-get update
	sudo apt-get install libcurl4-openssl-dev
	rake bundle:clean
	rake bundle:install
	- name: elasticsearch
	run: cd elasticsearch && bundle exec rake test:all
	- name: elasticsearch-api
	run: cd elasticsearch-api && bundle exec rake test:spec test:platinum:unit

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