minor #13980 ADD Annotations for The Locale and the URL section (SquareInnov)

This PR was submitted for the 5.1 branch but it was squashed and merged into the 4.4 branch instead.

Discussion
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ADD Annotations for The Locale and the URL section

ADD Annotations example for The Locale and the URL section.

Commits
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89ffeb1 ADD Annotations for The Locale and the URL section

Author: xabbuh

translation/locale.rst

@@ -64,6 +64,27 @@ A better policy is to include the locale in the URL using the
 
 .. configuration-block::
 
+    .. code-block:: php-annotations
+        
+        // src/Controller/ContactController.php
+        namespace App\Controller;
+
+        // ...
+        class ContactController extends AbstractController
+        {
+            /**
+             * @Route(
+             *     "/{_locale}/contact",
+             *     requirements={
+             *         "_locale": "en|fr|de",
+             *     }
+             * )
+             */
+            public function contact()
+            {
+            }
+        }
+
     .. code-block:: yaml
 
         # config/routes.yaml