minor #11471 Minor typo update for readability (shreypuranik)

This PR was submitted for the 4.2 branch but it was merged into the 3.4 branch instead (closes #11471).

Discussion
----------

Minor typo update for readability

Commits
-------

3b339be Minor typo update for readability

Author: javiereguiluz

page_creation.rst

@@ -41,7 +41,7 @@ Creating a Page: Route and Controller
     article and can access your new Symfony app in the browser.
 
 Suppose you want to create a page - ``/lucky/number`` - that generates a lucky (well,
-random) number and prints it. To do that, create a "Controller class" and a
+random) number and prints it. To do that, create a "Controller" class and a
 "controller" method inside of it that will be executed when someone goes to
 ``/lucky/number``::