feat(数据集): UI调整

frontend/src/views/dataset/add/AddCustom.vue

@@ -17,10 +17,10 @@
       <el-divider />
       <el-row>
         <el-col>
-          123
+          自助数据集
         </el-col>
         <el-col>
-          456
+          TODO
         </el-col>
       </el-row>
     </el-row>

frontend/src/views/dataset/add/AddExcel.vue

@@ -179,7 +179,7 @@ export default {
   }
 
   .form-item {
-    margin-bottom: 6px;
+    margin-bottom: 6px !important;
   }
 
   .el-checkbox {