fix: typo in kafka property

Signed-off-by: David Hontecillas <dhontecillas@gmail.com>

Author: dhontecillas

v2.13/backend/pubsub/kafka/publisher.json

@@ -6,7 +6,7 @@
   "type": "object",
   "required": [ "writer" ],
   "properties": {
-    "sucess_status_code": {
+    "success_status_code": {
       "title": "Success Status Code",
       "description": "http status code to return for a successful write in the queue",
       "type": "number",