fix: 修复 Tree 组件样式溢出问题

src/views/doc/components/main.vue

@@ -468,4 +468,7 @@
     .element-tree-node-line-ver {
     border: none;
   }
+  .el-tree-node > .el-tree-node__children{
+    overflow: inherit;
+  }
 </style>