bug #5162 Fix misplelled XliffFileLoader class in the Using Message Domains (Nicola Pietroluongo)

This PR was merged into the 2.6 branch.

Discussion
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Fix misplelled XliffFileLoader class in the Using Message Domains

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all
| Fixed tickets | none

Commits
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6ecf3b0 Fix misplelled XliffFileLoader class in the Using Message Domains example

Author: wouterj

components/translation/introduction.rst

@@ -186,7 +186,7 @@ organization, translations were split into three different domains:
 loaded like this::
 
     // ...
-    $translator->addLoader('xliff', new XliffLoader());
+    $translator->addLoader('xliff', new XliffFileLoader());
 
     $translator->addResource('xliff', 'messages.fr.xliff', 'fr_FR');
     $translator->addResource('xliff', 'admin.fr.xliff', 'fr_FR', 'admin');