📝 Update changelogs

Signed-off-by: Daniel <845765@qq.com>

app/changelogs/v3.5.7/v3.5.7.md

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+## Overview
+
+This version improves some details.
+
+## Changelogs
+
+Below are the detailed changes in this version.
+
+### Enhancement
+
+* [Improve export of merged cell tables](https://github.com/siyuan-note/siyuan/issues/17036)
+* [Should not prompt non-Chromium-based browsers on HarmonyOS](https://github.com/siyuan-note/siyuan/issues/17039)
+
+### Bugfix
+
+* [The export preview is missing the width and height of the iframe block](https://github.com/siyuan-note/siyuan/issues/17033)
+* [Hyperlink address parsing error](https://github.com/siyuan-note/siyuan/issues/17034)
+
+## Download
+
+* [B3log](https://b3log.org/siyuan/en/download.html)
+* [GitHub](https://github.com/siyuan-note/siyuan/releases)

app/changelogs/v3.5.7/v3.5.7_zh_CHT.md

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+## 概述
+
+此版本改進了一些細節。
+
+## 變更記錄
+
+以下是此版本中的詳細變更。
+
+### 改進功能
+
+* [改進合併儲存格表格匯出](https://github.com/siyuan-note/siyuan/issues/17036)
+* [鴻蒙端不應該提示非 Chromium 核心瀏覽器](https://github.com/siyuan-note/siyuan/issues/17039)
+
+### 修復缺陷
+
+* [匯出預覽 IFrame 區塊缺少高寬](https://github.com/siyuan-note/siyuan/issues/17033)
+* [超連結解析錯誤](https://github.com/siyuan-note/siyuan/issues/17034)
+
+## 下載
+
+* [B3log](https://b3log.org/siyuan/download.html)
+* [GitHub](https://github.com/siyuan-note/siyuan/releases)

app/changelogs/v3.5.7/v3.5.7_zh_CN.md

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+## 概述
+
+此版本改进了一些细节。
+
+## 变更记录
+
+以下是此版本中的详细变更。
+
+### 改进功能
+
+* [改进合并单元格表格导出](https://github.com/siyuan-note/siyuan/issues/17036)
+* [鸿蒙端不应该提示非 Chromium 内核浏览器](https://github.com/siyuan-note/siyuan/issues/17039)
+
+### 修复缺陷
+
+* [导出预览 IFrame 块缺失高宽](https://github.com/siyuan-note/siyuan/issues/17033)
+* [超链接解析错误](https://github.com/siyuan-note/siyuan/issues/17034)
+
+## 下载
+
+* [B3log](https://b3log.org/siyuan/download.html)
+* [GitHub](https://github.com/siyuan-note/siyuan/releases)