fix: CN-1016:表格样式调整（去掉竖线）

src/assets/css/components/views/setting/knowledgeBase.scss

@@ -329,6 +329,9 @@
           border-right:none;
           border-bottom:none;
         }
+        .el-table--border th ,.el-table--border td {
+          border-right: none;
+        }
         .el-table {
           th {
             padding-top:6px;