Release to experimental.

debian/changelog

@@ -1,4 +1,4 @@
-qt6-base (6.4.1+dfsg-1) UNRELEASED; urgency=medium
+qt6-base (6.4.1+dfsg-1) experimental; urgency=medium
 
   [ Patrick Franz ]
   * Make cmake a suggestion of qt6-base-dev-tools instead of a hard
@@ -7,7 +7,7 @@ qt6-base (6.4.1+dfsg-1) UNRELEASED; urgency=medium
   * Update ABI to 6.4.1.
   * Update symbols from buildlogs.
 
- -- Debian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>  Tue, 15 Nov 2022 18:13:27 +0100
+ -- Patrick Franz <deltaone@debian.org>  Tue, 15 Nov 2022 18:30:46 +0100
 
 qt6-base (6.4.0+dfsg-5) experimental; urgency=medium