bug #4623 [OptionsResolver] Fix Namespace link (xavren)

This PR was merged into the 2.3 branch.

Discussion
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[OptionsResolver] Fix Namespace link

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | 2.3
| Fixed tickets | #4620

Commits
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fc43571 [OptionsResolver] Fix Namespace link

components/options_resolver.rst

@@ -360,7 +360,7 @@ pretend that the ``host`` should always start with ``http://``. To do that,
 you can write normalizers. These closures will be executed after all options
 are passed and should return the normalized value. You can configure these
 normalizers by calling
-:method:`Symfony\\Components\\OptionsResolver\\OptionsResolver::setNormalizers`::
+:method:`Symfony\\Component\\OptionsResolver\\OptionsResolver::setNormalizers`::
 
     // ...
     protected function setDefaultOptions(OptionsResolverInterface $resolver)