minor #19477 Add message to #[MapEntity] for NotFoundHttpException (mdoutreluingne)

This PR was squashed before being merged into the 7.1 branch.

Discussion
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Add message to #[MapEntity] for NotFoundHttpException

Fixes #19476

Commits
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41bea4e Add message to #[MapEntity] for NotFoundHttpException

Author: javiereguiluz

doctrine.rst

@@ -820,6 +820,21 @@ control behavior:
 ``disabled``
     If true, the ``EntityValueResolver`` will not try to replace the argument.
 
+``message``
+    If a ``message`` option is configured, the value of the ``message`` option will be displayed in the development
+    environment for the :class:`Symfony\\Component\\HttpKernel\\Exception\\NotFoundHttpException` exception::
+
+        #[Route('/product/{product_id}')]
+        public function show(
+            #[MapEntity(id: 'product_id', message: 'The product does not exist')]
+            Product $product
+        ): Response {
+        }
+
+.. versionadded:: 7.1
+
+    The ``message`` option was introduced in Symfony 7.1.
+
 Updating an Object
 ------------------