docs: fix image in README.md #61

	name: Test Suite
	on:
	push:
	branches:
	- main
	pull_request:
	jobs:
	test:
	runs-on: ubuntu-latest
	services:
	redis:
	image: redis
	ports:
	- 6379:6379
	options: --health-cmd="redis-cli ping" --health-interval=10s --health-timeout=5s --health-retries=3
	mongodb:
	image: mongo
	ports:
	- 27017:27017
	myriadb:
	image: mariadb
	env:
	MYSQL_ROOT_PASSWORD: root
	ports:
	- 3808:3808
	- 3306:3306
	postgres:
	image: postgres
	env:
	POSTGRES_DB: oauth2_server_php
	POSTGRES_USER: postgres
	POSTGRES_PASSWORD: postgres
	ports:
	- 5432:5432
	options: --health-cmd="pg_isready -h localhost" --health-interval=10s --health-timeout=5s --health-retries=5
	strategy:
	matrix:
	php: [ 7.2, 7.3, 7.4, "8.0", 8.1, 8.2 ]
	name: "PHP ${{ matrix.php }} Unit Test"
	steps:
	- uses: actions/checkout@v2
	- uses: codecov/codecov-action@v1
	- name: Setup PHP
	uses: shivammathur/setup-php@v2
	with:
	php-version: ${{ matrix.php }}
	extensions: mongodb, mbstring, intl, redis, pdo_mysql
	- name: Install composer dependencies
	uses: nick-invision/retry@v1
	with:
	timeout_minutes: 10
	max_attempts: 3
	command: composer install
	- name: Run PHPUnit
	run: vendor/bin/phpunit -v
	phpstan:
	name: "PHPStan"
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Setup PHP
	uses: shivammathur/setup-php@v2
	with:
	php-version: 8.1
	- name: Install composer dependencies
	uses: nick-invision/retry@v1
	with:
	timeout_minutes: 10
	max_attempts: 3
	command: composer install
	- name: Run PHPStan
	run: \|
	composer require phpstan/phpstan
	vendor/bin/phpstan analyse --level=0 src/

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