Release to unstable as a team upload.

debian/changelog

@@ -1,9 +1,9 @@
-qt6-base (6.4.2+dfsg-9) UNRELEASED; urgency=medium
+qt6-base (6.4.2+dfsg-9) unstable; urgency=medium
 
-  [ Lisandro Damián Nicanor Pérez Meyer ]
+  * Team upload.
   * Add a patch to fix CVE-2023-32762.
 
- -- Debian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>  Mon, 22 May 2023 11:36:51 -0300
+ -- Lisandro Damián Nicanor Pérez Meyer <lisandro@debian.org>  Mon, 22 May 2023 11:40:45 -0300
 
 qt6-base (6.4.2+dfsg-8) unstable; urgency=medium