chore: add label for DecodedJsonPayload

Signed-off-by: Dominic Hock <[email protected]>

src/Payloads/DecodedJsonPayload.php

@@ -25,7 +25,7 @@ public function getContent(): array
 
         return [
             'content' => ArgumentConverter::convertToPrimitive($decodedJson),
-            'label' => '',
+            'label' => 'DecodedJson',
         ];
     }
 }