Update components/dependency_injection.rst

Co-authored-by: Oskar Stark <[email protected]>

Author: alamirault

components/dependency_injection.rst

@@ -182,7 +182,7 @@ By default, an exception is throw when a service does not exist. You can overrid
 
     // ...
 
-    // the second argument is optional and define behavior
+    // the second argument is optional and define the behavior
     $newsletterManager = $containerBuilder->get('newsletter_manager', ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE);