Merge pull request #3036 from glorand/patch-2

Update available php version list

DOCUMENTATION/content/introduction/index.md

@@ -17,7 +17,7 @@ It supports a variety of common services, all pre-configured to provide a ready
 <a name="features"></a>
 ## Features
 
-- Easy switch between PHP versions: 7.4, 7.3, 7.2, 7.1, 5.6...
+- Easy switch between PHP versions: 8.0, 7.4, 7.3, 7.2, 7.1, 5.6...
 - Choose your favorite database engine: MySQL, Postgres, MariaDB...
 - Run your own stack: Memcached, HHVM, RabbitMQ...
 - Each software runs on its own container: PHP-FPM, NGINX, PHP-CLI...