Release to unstable.

debian/changelog

@@ -1,9 +1,9 @@
-qt6-base (6.4.2+dfsg-11) UNRELEASED; urgency=medium
+qt6-base (6.4.2+dfsg-11) unstable; urgency=medium
 
   [ Patrick Franz ]
   * Add patch to fix CVE-2023-34410 (Closes: #1037209).
 
- -- Debian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>  Wed, 07 Jun 2023 21:41:19 +0200
+ -- Patrick Franz <deltaone@debian.org>  Wed, 07 Jun 2023 21:54:59 +0200
 
 qt6-base (6.4.2+dfsg-10) unstable; urgency=medium