Fix format Server Requirements (#7834)

installation.md

@@ -20,6 +20,7 @@ The Laravel framework has a few system requirements. Of course, all of these req
 However, if you are not using Homestead, you will need to make sure your server meets the following requirements:
 
 <div class="content-list" markdown="1">
+
 - PHP >= 7.1.3
 - OpenSSL PHP Extension
 - PDO PHP Extension
@@ -28,6 +29,7 @@ However, if you are not using Homestead, you will need to make sure your server
 - XML PHP Extension
 - Ctype PHP Extension
 - JSON PHP Extension
+
 </div>
 
 <a name="installing-laravel"></a>