chore: update changelog

[deepin-ci-robot]

Release 5.7.4.

[github-actions]

TAG Bot

TAG: 5.7.4
EXISTED: no
DISTRIBUTION: unstable

[FeiWang1119]

/topic dtk5-5.7.4

[deepin-ci-robot]

Add topic: dtk5-5.7.4 successed.

[deepin-ci-robot]

deepin pr auto review

这个提交的changelog文件中，有两个主要的问题需要解决：

1. 重复的修复记录：

   • 提交中两次提到了“app crashed when window destroyed in quick”，这可能是由于复制粘贴错误导致的。应该删除重复的修复记录，只保留一次。

2. 缺少具体的修复描述：

   • 提交信息中只提到了“fix”，但没有提供具体的修复内容或原因。为了更好地理解这次提交的目的和影响，应该添加更详细的描述，说明修复了哪些问题，以及这些修复如何解决这些问题。

改进后的changelog文件可能如下所示：

dde-qt5platform-plugins (5.7.4) unstable; urgency=medium

  * fix: 修复了在Quick应用中窗口销毁时应用崩溃的问题
  * fix: 修复了在析构时hasVtable不正确的问题

 -- Deepin Packages Builder <packages@deepin.org>  Tue, 03 Dec 2024 02:00:46 +0000

通过这些改进，可以使changelog文件更加清晰和有用，便于其他开发者理解这次提交的目的和内容。

[github-actions]

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This pull-request has been approved by: deepin-ci-robot, kegechen

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