minor #7423 [HttpFoundation][Fix] Component version (20uf)

This PR was submitted for the 3.2 branch but it was merged into the 2.7 branch instead (closes #7423).

Discussion
----------

[HttpFoundation][Fix] Component version

Hello,

Small PR to correct the version of the component HttpFoundation in the composer.json.

Regards,

Commits
-------

d60f64d [HttpFoundation][Fix] Component version

Author: xabbuh

create_framework/http_foundation.rst

@@ -119,18 +119,7 @@ To use this component, add it as a dependency of the project:
 Running this command will also automatically download the Symfony
 HttpFoundation component and install it under the ``vendor/`` directory.
 A ``composer.json`` and a ``composer.lock`` file will be generated as well,
-containing the new requirement:
-
-.. code-block:: json
-
-    {
-        "require": {
-            "symfony/http-foundation": "^2.7"
-        }
-    }
-
-The code block shows the content of the ``composer.json`` file (the actual
-version may vary).
+containing the new requirement.
 
 .. sidebar:: Class Autoloading