Add a note on asset.strict

Author: GromNaN

reference/configuration/framework.rst

@@ -2171,6 +2171,10 @@ strict
 
 **type**: ``boolean`` **default**: ``false``
 
+Used with ``json_manifest_path``. If ``true``, an exception is thrown when an asset is not found
+in the manifest. Using ``%kernel.debug%`` is recommended to find bugs during development and keep
+stability on production.
+
 .. versionadded:: 5.2
 
     This option was introduced in Symfony 5.2.