minor symfony#7662 Update request_context.rst (krlove)

This PR was submitted for the 3.2 branch but it was merged into the 2.7 branch instead (closes symfony#7662).

Discussion
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Update request_context.rst

Commits
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d445612 Update request_context.rst

console/request_context.rst

@@ -54,7 +54,7 @@ will override the defaults.
 
     .. code-block:: php
 
-        // app/config/config_test.php
+        // app/config/parameters.php
         $container->setParameter('router.request_context.host', 'example.org');
         $container->setParameter('router.request_context.scheme', 'https');
         $container->setParameter('router.request_context.base_url', 'my/path');