Release to experimental.

debian/changelog

@@ -1,4 +1,4 @@
-qt6-base (6.2.2+dfsg-4) UNRELEASED; urgency=medium
+qt6-base (6.2.2+dfsg-4) experimental; urgency=medium
 
   [ Pino Toscano ]
   * Backport upstream commit 06e7b5168e269f913f03ecb9d77fc82db4d9dfd6 to enable
@@ -9,7 +9,7 @@ qt6-base (6.2.2+dfsg-4) UNRELEASED; urgency=medium
   * Pass -DFEATURE_system_libb2=ON to cmake to make sure the system blake2
     implementation (libb2) is used instead of the embedded copy.
 
- -- Debian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>  Thu, 10 Feb 2022 07:33:31 +0100
+ -- Patrick Franz <deltaone@debian.org>  Tue, 15 Feb 2022 01:09:24 +0100
 
 qt6-base (6.2.2+dfsg-3) experimental; urgency=medium