fix 导出excel number列问题

es/table/index.js

@@ -1211,7 +1211,7 @@ const _sfc_main = defineComponent({
             }
           });
           if (tableColumn.type == "number") {
-            info[item.key] = rowIndex + 1;
+            info[tableColumn.key] = rowIndex + 1;
           }
         });
         list.push(info);