Update changelog

debian/changelog

-gnome-control-center (1:3.34.4-2) UNRELEASED; urgency=medium
-
-  * Wrap long lines in changelog entries: 1:2.4.0-7, 1:2.4.0-2, 1:2.2.2-
-    2, 1:2.2.0-1, 1.0.51-1.
-  * Set field Upstream-Name in debian/copyright.
-  * Set upstream metadata fields: Bug-Database, Bug-Submit, Repository,
-    Repository-Browse.
-
- -- Simon McVittie <smcv@debian.org>  Sat, 29 Feb 2020 20:58:52 +0000
-
 gnome-control-center (1:3.34.4-1) UNRELEASED; urgency=medium
 
   * New upstream release
   * Bump Standards-Version to 4.5.0
+  * Wrap long lines in changelog entries: 1:2.4.0-7, 1:2.4.0-2,
+    1:2.2.2-2, 1:2.2.0-1, 1.0.51-1
+  * Set field Upstream-Name in debian/copyright
+  * Set upstream metadata fields: Bug-Database, Bug-Submit, Repository,
+    Repository-Browse
+  * Move to debhelper-compat 12
 
  -- Simon McVittie <smcv@debian.org>  Sat, 29 Feb 2020 18:31:43 +0000