[Scheduler] add note about the recipe

Author: kbond

scheduler.rst

@@ -27,10 +27,10 @@ install the scheduler component:
 
     $ composer require symfony/scheduler
 
-.. tip::
+.. note::
 
-    Starting in `MakerBundle`_ ``v1.58.0``, you can run ``php bin/console make:schedule``
-    to generate a basic schedule, that you can customize to create your own Scheduler.
+    The Symfony Scheduler Flex recipe creates an initial schedule that's ready
+    to start adding your tasks.
 
 Symfony Scheduler Basics
 ------------------------