minor #7303 describe should have an 's' on the end (levidurfee)

This PR was submitted for the 3.2 branch but it was merged into the 2.7 branch instead (closes #7303).

Discussion
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describe should have an 's' on the end

3rd person present

To give an account in words of (someone or something), including all the relevant characteristics, qualities, or events.

Commits
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8638d1b describe should have an 's' on the end

Author: xabbuh

create_framework/routing.rst

@@ -56,7 +56,7 @@ Instead of an array for the URL map, the Routing component relies on a
 
     $routes = new RouteCollection();
 
-Let's add a route that describe the ``/hello/SOMETHING`` URL and add another
+Let's add a route that describes the ``/hello/SOMETHING`` URL and add another
 one for the simple ``/bye`` one::
 
     use Symfony\Component\Routing\Route;