docs: opt docs about tabs (#48280)

components/tabs/index.en-US.md

@@ -50,7 +50,7 @@ Common props ref：[Common props](/docs/react/common-props)
 | addIcon | Customize add icon, only works with `type="editable-card"` | ReactNode | `<PlusOutlined />` | 4.4.0 |
 | animated | Whether to change tabs with animation. | boolean \| { inkBar: boolean, tabPane: boolean } | { inkBar: true, tabPane: false } |  |
 | centered | Centers tabs | boolean | false | 4.4.0 |
-| defaultActiveKey | Initial active TabPane's key, if `activeKey` is not set | string | - |  |
+| defaultActiveKey | Initial active TabPane's key, if `activeKey` is not set | string | `The key of first tab` |  |
 | hideAdd | Hide plus icon or not. Only works while `type="editable-card"` | boolean | false |  |
 | indicator | Customize `size` and `align` of indicator | { size?: number \| (origin: number) => number; align: `start` \| `center` \| `end`; } | - | 5.13.0 |
 | items | Configure tab content | [TabItemType](#tabitemtype) | [] | 4.23.0 |

components/tabs/index.zh-CN.md

@@ -52,7 +52,7 @@ Ant Design 依次提供了三级选项卡，分别用于不同的场景。
 | addIcon | 自定义添加按钮，设置 `type="editable-card"` 时有效 | ReactNode | `<PlusOutlined />` | 4.4.0 |
 | animated | 是否使用动画切换 Tabs | boolean\| { inkBar: boolean, tabPane: boolean } | { inkBar: true, tabPane: false } |  |
 | centered | 标签居中展示 | boolean | false | 4.4.0 |
-| defaultActiveKey | 初始化选中面板的 key，如果没有设置 activeKey | string | `第一个面板` |  |
+| defaultActiveKey | 初始化选中面板的 key，如果没有设置 activeKey | string | `第一个面板的 key` |  |
 | hideAdd | 是否隐藏加号图标，在 `type="editable-card"` 时有效 | boolean | false |  |
 | indicator | 自定义指示条的长度和对齐方式 | { size?: number \| (origin: number) => number; align: `start` \| `center` \| `end`; } | - | 5.13.0 |
 | items | 配置选项卡内容 | [TabItemType](#tabitemtype) | [] | 4.23.0 |