minor #19806 [FrameworkBundle] Add reference to framework.session.storage_id option (cs278)

This PR was merged into the 5.4 branch.

Discussion
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[FrameworkBundle] Add reference to `framework.session.storage_id` option

Relates to #14979

I appreciate this is a low effort fix. I've been trying to work out why my app breaks when removing the  `framework.session.storage_id` option which I had assumed was unused based on the fact it is not in the documentation. I figured it was a left over from a previous Symfony upgrade - hopefully this hint helps somebody else in the same boat.

Commits
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0b3b569 Add reference to undocumented configuration option

Author: javiereguiluz

reference/configuration/framework.rst

@@ -1629,7 +1629,7 @@ To see a list of all available storages, run:
 
 .. versionadded:: 5.3
 
-    The ``storage_factory_id`` option was introduced in Symfony 5.3.
+    The ``storage_factory_id`` option was introduced in Symfony 5.3 deprecating the ``storage_id`` option.
 
 .. _config-framework-session-handler-id: