minor #9535 Fix "SplFileInfo" URL (liviubalan, Liviu Balan)

This PR was merged into the 3.4 branch.

Discussion
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Fix "SplFileInfo" URL

Change generated URL "http://api.symfony.com/3.4/SplFileInfo.html" to "http://php.net/manual/en/class.splfileinfo.php"

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Commits
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0ea6555 Changes after code review
6dbb432 Fix "SplFileInfo" URL

Author: javiereguiluz

serializer.rst

@@ -101,7 +101,7 @@ As well as the following normalizers:
 * :class:`Symfony\\Component\\Serializer\\Normalizer\\DateTimeNormalizer` for
   objects implementing the :phpclass:`DateTimeInterface` interface
 * :class:`Symfony\\Component\\Serializer\\Normalizer\\DataUriNormalizer` to
-  transform :class:`SplFileInfo` objects in `Data URIs`_
+  transform :phpclass:`SplFileInfo` objects in `Data URIs`_
 * :class:`Symfony\\Component\\Serializer\\Normalizer\\JsonSerializableNormalizer`
   to deal with objects implementing the :class:`JsonSerializable` interface
 * :class:`Symfony\\Component\\Serializer\\Normalizer\\ArrayDenormalizer` to