fix 修复电子餐券退款问题

Src/Dlhis.Canteen/Order/Controllers/BalancesController.cs

@@ -61,9 +61,9 @@ public class BalancesController : ControllerBase
     [HttpPost("refund")]
     [IgnoreTenant]
     [Transactional(IsolationLevel.ReadCommitted)]
-    public async Task<OrderResultResponse> RefundAsync(BalanceRecordRefundRequest request)
+    public async Task RefundAsync(BalanceRecordRefundRequest request)
     {
-        return await _balanceService.RefundAsync(request.No);
+         await _balanceService.RefundAsync(request.No);
     }