minor #4825 Fixed the 404 not found error (SofHad)

This PR was merged into the 2.3 branch.

Discussion
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Fixed the 404 not found error

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all
| Fixed tickets | no

On this page: http://symfony.com/doc/master/components/templating/helpers/slotshelper.html

Commits
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cc7853d Fixed 404 page

components/templating/helpers/slotshelper.rst

@@ -55,7 +55,7 @@ Extending Templates
 
 The :method:`Symfony\\Component\\Templating\\PhpEngine::extend` method is called in the
 sub-template to set its parent template. Then
-:method:`$view['slots']->set() <Symfony\\Component\\Translation\\Helper\\SlotsHelper::set>`
+:method:`$view['slots']->set() <Symfony\\Component\\Templating\\Helper\\SlotsHelper::set>`
 can be used to set the content of a slot. All content which is not explicitly
 set in a slot is in the ``_content`` slot.