fix: 订单列表合同性质0位--

Signed-off-by: tangshizhe <48740614+tangshizhe@users.noreply.github.com>

src/views/order/orderList.vue

@@ -463,7 +463,7 @@ export default {
           render: (h, {row}) => {
             let contract_nature = ''
             if (row.contract_nature == '') {
-              contract_nature = '全部'
+              contract_nature = '--'
             }else if (row.contract_nature == '1') {
               contract_nature = '新签合同'
             } else if (row.contract_nature == '2') {