Fix GreetingInputDenormalizer::getSupportedTypes

`Error: Class App\Rest\Serializer\GreetingInputDenormalizer contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (Symfony\Component\Serializer\Normalizer\DenormalizerInterface::getSupportedTypes)`

Author: adriendupuis

code_samples/api/rest_api/src/Rest/Serializer/GreetingInputDenormalizer.php

@@ -35,7 +35,14 @@ public function supportsDenormalization(mixed $data, string $type, ?string $form
         }
         $data = array_change_key_case($data);
 
-        return Greeting::class === $type &&
+        return in_array($type, $this->getSupportedTypes($format), true) &&
             (array_key_exists('salutation', $data) || array_key_exists('recipient', $data));
     }
+
+    public function getSupportedTypes(?string $format): array
+    {
+        return [
+            Greeting::class => true,
+        ];
+    }
 }