fix docblock position

The `$defaultLocale` argument is present in the `Translator` class of
the FrameworkBundle, but is not part of the Translation component.

Author: xabbuh

Translation/Translator.php

@@ -48,10 +48,11 @@ class Translator extends BaseTranslator implements WarmableInterface
      *   * debug:     Whether to enable debugging or not (false by default)
      *   * resource_files: List of translation resources available grouped by locale.
      *
-     * @param ContainerInterface $container A ContainerInterface instance
-     * @param MessageSelector    $selector  The message selector for pluralization
-     * @param array              $loaderIds An array of loader Ids
-     * @param array              $options   An array of options
+     * @param ContainerInterface $container     A ContainerInterface instance
+     * @param MessageSelector    $selector      The message selector for pluralization
+     * @param string             $defaultLocale
+     * @param array              $loaderIds     An array of loader Ids
+     * @param array              $options       An array of options
      *
      * @throws InvalidArgumentException
      */