docs: totalBoundaryShowSizeChanger for Pagination (ant-design#56471)

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
Co-authored-by: afc163 <afc163@gmail.com>

Author: 3 people

components/pagination/index.en-US.md

@@ -53,7 +53,8 @@ Common props ref：[Common props](/docs/react/common-props)
 | responsive | If `size` is not specified, `Pagination` would resize according to the width of the window | boolean | - |  |
 | showLessItems | Show less page items | boolean | false |  |
 | showQuickJumper | Determine whether you can jump to pages directly | boolean \| { goButton: ReactNode } | false |  |
-| showSizeChanger | Determine whether to show `pageSize` select, it will be true when `total > 50` | boolean \| [SelectProps](/components/select#api) | - | SelectProps: 5.21.0 |
+| showSizeChanger | Determine whether to show `pageSize` select | boolean \| [SelectProps](/components/select#api) | - | SelectProps: 5.21.0 |
+| totalBoundaryShowSizeChanger | When `total` larger than it, `showSizeChanger` will be true | number | 50 | |
 | showTitle | Show page item's title | boolean | true |  |
 | showTotal | To display the total number and range | function(total, range) | - |  |
 | simple | Whether to use simple mode | boolean \| { readOnly?: boolean } | - |  |

components/pagination/index.zh-CN.md

@@ -54,7 +54,8 @@ coverDark: https://mdn.alipayobjects.com/huamei_7uahnr/afts/img/A*WM86SrBC8TsAAA
 | responsive | 当 size 未指定时，根据屏幕宽度自动调整尺寸 | boolean | - |  |
 | showLessItems | 是否显示较少页面内容 | boolean | false |  |
 | showQuickJumper | 是否可以快速跳转至某页 | boolean \| { goButton: ReactNode } | false |  |
-| showSizeChanger | 是否展示 `pageSize` 切换器，当 `total` 大于 50 时默认为 true | boolean \| [SelectProps](/components/select-cn#api) | - | SelectProps: 5.21.0 |
+| showSizeChanger | 是否展示 `pageSize` 切换器 | boolean \| [SelectProps](/components/select-cn#api) | - | SelectProps: 5.21.0 |
+| totalBoundaryShowSizeChanger | 当 `total` 大于该值时，`showSizeChanger` 默认为 true | number | 50 | |
 | showTitle | 是否显示原生 tooltip 页码提示 | boolean | true |  |
 | showTotal | 用于显示数据总量和当前数据顺序 | function(total, range) | - |  |
 | simple | 当添加该属性时，显示为简单分页 | boolean \| { readOnly?: boolean } | - |  |