minor #14400 [Routing] Better use of composer require (Nyholm)

This PR was squashed before being merged into the 5.x branch.

Discussion
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[Routing] Better use of composer require

For Symfony 4.4

This will correct the mistake in #14387

If we still want to use the alias, please consider this PR: #14399

Commits
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41b7983 [Routing] Better use of composer require

Author: wouterj

routing.rst

@@ -1063,12 +1063,11 @@ integer acting as the user ID) into another value (e.g. the object that
 represents the user). This feature is called "param converter" and is only
 available when using annotations to define routes.
 
-In case you didn't run this command before, run it now to add support for
-annotations and "param converters":
+To add support for "param converters" we need SensioFrameworkExtraBundle:
 
 .. code-block:: terminal
 
-    $ composer require annotations
+    $ composer require sensio/framework-extra-bundle
 
 Now, keep the previous route configuration, but change the arguments of the
 controller action. Instead of ``string $slug``, add ``BlogPost $post``::