Fixed a syntax issue

Author: javiereguiluz

components/http_foundation/introduction.rst

@@ -255,8 +255,8 @@ by using the following methods:
 :method:`Symfony\\Component\\HttpFoundation\\Request::getEncodings`
     Returns the list of accepted encodings ordered by descending quality.
 
-  .. versionadded:: 2.4
-      The ``getEncodings()`` method was introduced in Symfony 2.4.
+    .. versionadded:: 2.4
+        The ``getEncodings()`` method was introduced in Symfony 2.4.
 
 If you need to get full access to parsed data from ``Accept``, ``Accept-Language``,
 ``Accept-Charset`` or ``Accept-Encoding``, you can use