Update components/http_foundation.rst

Co-authored-by: Oskar Stark <[email protected]>

Author: alexander-schranz

components/http_foundation.rst

@@ -641,9 +641,7 @@ of Generators.
 It expects a JSON structure with one or multiple replacers identifiers, as example
 the `'__articles__'`. As a second argument it requires one or multiple Generators
 which items can be converted to a JSON via ``json_encode`` method. The key of the
-Generators requires to be the used replacer identifiers.
-
-.. code-block:: php
+Generators requires to be the used replacer identifiers::
 
     use Symfony\Component\HttpFoundation\StreamedJsonResponse;