minor #16558 [FrameworkBundle] Change exceptions title level (t-richard)

This PR was merged into the 5.4 branch.

Discussion
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[FrameworkBundle] Change exceptions title level

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On [this page](https://symfony.com/doc/5.4/reference/configuration/framework.html#exceptions), `exceptions` is a top level configuration option so it should have a higher title level and appear in the table of content.

To my understanding, this should fix it

Commits
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60eb024 [FrameworkBundle] Change exceptions title level

Author: javiereguiluz

reference/configuration/framework.rst

@@ -3476,7 +3476,7 @@ a normal workflow or a state machine. Read :doc:`this article </workflow/workflo
 to know their differences.
 
 exceptions
-""""""""""
+~~~~~~~~~~
 
 **type**: ``array``