fix Behat

Author: Maxcastel

tests/Fixtures/TestBundle/ApiResource/Polymorphism/Book.php

@@ -20,9 +20,10 @@
 use Symfony\Component\Serializer\Attribute\DiscriminatorMap;
 
 #[ApiResource(
+    uriTemplate: '/polymorphism_books',
     operations: [
         new GetCollection(),
-        new Get(),
+        new Get(uriTemplate: '/polymorphism_books/{id}'),
     ],
 )]
 #[DiscriminatorMap(typeProperty: 'bookType', mapping: [