:fix fix webhook order event schema (#2434)

Author: shineli1984

packages/webhook/sdk/src/event-types.ts

@@ -274,17 +274,15 @@ export interface ZkevmOrderUpdated {
     id: string;
     buy: {
       item_type: string;
-      end_amount: string;
-      start_amount: string;
+      amount: string;
       contract_address: string;
     }[];
     hash: string;
     salt: string;
     sell: {
       token_id: string;
       item_type: string;
-      end_amount: string;
-      start_amount: string;
+      amount: string;
       contract_address: string;
     }[];
     status: string;