minor #14291 [Translation] Change translatable example parameter key (natewiebe13)

This PR was merged into the master branch.

Discussion
----------

[Translation] Change translatable example parameter key

Updated the translatable example to use a key wrapped in `%` as recommended in the docs. Also changed the key to one that I think would be less likely confused with passing the whole order object.

Commits
-------

24b9aeb Change translatable example parameter key

Author: javiereguiluz

translation.rst

@@ -316,7 +316,7 @@ all the information needed to fully translate its contents when needed::
     $message = new Translatable('Symfony is great!');
     // the optional second argument defines the translation parameters and
     // the optional third argument is the translation domain
-    $status = new Translatable('order.status', ['order' => $order], 'store');
+    $status = new Translatable('order.status', ['%status%' => $order->getStatus()], 'store');
 
 Templates are now much simpler because you can pass translatable objects to the
 ``trans`` filter: