fix cashout

mallinkService/src/main/java/com/iformall/service/pay/service/cashout/wx/WxCashOutAdapterService.java

@@ -277,7 +277,7 @@ public class WxCashOutAdapterService implements CashOutAdapterService{
             throw new MallinkException(ErrorCode.SYS_PARAMETER_CAST_ERROR.getCode(), "零钱支付签名异常");
         }
 
-        String signAgent = WxPayment.createSign(signMap, payAccount.getApiKey());
+        String signAgent = WxPayment.createSign(signMap, payAccount.getMerchantApiKey());
         signMap.put("sign", signAgent);
         String response = null;
         try {