Release to unstable as a team upload.

debian/changelog

@@ -1,4 +1,6 @@
-qt6-base (6.4.2+dfsg-13) UNRELEASED; urgency=medium
+qt6-base (6.4.2+dfsg-13) experimental; urgency=medium
+
+  * Team upload to unstable.
 
   [ Pino Toscano ]
   * Drop the support for the dead GNU/kFreeBSD (which was never really used):
@@ -15,7 +17,7 @@ qt6-base (6.4.2+dfsg-13) UNRELEASED; urgency=medium
   * Fix wrong Break+Replaces on qt6-base-dev against libqt6opengl6-dev
     (Closes: #1041300). Thanks Helmut Grohne for the bug report.
 
- -- Debian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>  Sat, 15 Jul 2023 14:26:49 +0200
+ -- Lisandro Damián Nicanor Pérez Meyer <lisandro@debian.org>  Mon, 17 Jul 2023 10:51:55 -0300
 
 qt6-base (6.4.2+dfsg-12) experimental; urgency=medium