new line added to lock-files.md

Author: Andrei Onita

docs/book/v3/lock-files.md

@@ -11,4 +11,4 @@ Inside `config/autoload/cli.global.php` under the `FileLockerInterface::class` k
     FileLockerInterface::class => [
         'enabled' => true,
         'dirPath' => getcwd() . '/data/lock',
-    ],
+    ],