docs: change the default value 'closeable' (ant-design#47730)

Change the default value of the attribute 'closeable' from true to false

Signed-off-by: yingjiechen <[email protected]>

components/modal/index.zh-CN.md

@@ -104,7 +104,7 @@ demo:
 | cancelText | 设置 Modal.confirm 取消按钮文字 | string | `取消` |  |
 | centered | 垂直居中展示 Modal | boolean | false |  |
 | className | 容器类名 | string | - |  |
-| closable | 是否显示右上角的关闭按钮 | boolean | false | 4.9.0 |
+| closable | 是否显示右上角的关闭按钮 | boolean | true | 4.9.0 |
 | closeIcon | 自定义关闭图标 | ReactNode | undefined | 4.9.0 |
 | content | 内容 | ReactNode | - |  |
 | footer | 底部内容，当不需要默认底部按钮时，可以设为 `footer: null` | (params:[footerRenderParams](/components/modal-cn#footerrenderparams))=> React.ReactNode \| React.ReactNode | - | 5.9.0 |