Update environments.rst

Author: atailouloute

configuration/environments.rst

@@ -297,7 +297,7 @@ The best way to accomplish this is via a new environment called, for example,
         $loader->import('config_prod.php')
 
         $container->loadFromExtension('framework', array(
-            'profiler' => array('only-exceptions' => false),
+            'profiler' => array('only_exceptions' => false),
         ));
 
 .. include:: /components/dependency_injection/_imports-parameters-note.rst.inc