🚑 Fixed: "Could not find package annotations" in composer require

Apparently, the "annotations" package doesn't exists. I saw in packagist page that the routing component requires a 'doctrine/annotations: ~1.2'.
Packagist symfony/routing url: https://packagist.org/packages/symfony/routing

Author: Gabriel Albuquerque

routing.rst

@@ -27,7 +27,7 @@ Run this command once in your application to add support for annotations:
 
 .. code-block:: terminal
 
-    $ composer require annotations
+    $ composer require doctrine/annotations
 
 In addition to installing the needed dependencies, this command creates the
 following configuration file: