Updated debian changelog for version 2.2.0

debian/changelog

+swh-scrubber (2.2.0-1~swh1) unstable-swh; urgency=medium
+
+  * New upstream release 2.2.0     - (tagged by David Douard
+    <david.douard@sdfa3.org> on 2023-12-05 11:50:12 +0100)
+  * Upstream changes:     - v2.2.0     - Migrate to copier, PEP420 and
+    pyproject.toml based packaging.     - Add a cli too to get stats for
+    a given config enctry.     - Fix a crash in the journal checker.
+
+ -- Software Heritage autobuilder (on jenkins-debian1) <jenkins@jenkins-debian1.internal.softwareheritage.org>  Tue, 05 Dec 2023 10:56:30 +0000
+
 swh-scrubber (2.1.0-1~swh1) unstable-swh; urgency=medium
 
   * New upstream release 2.1.0     - (tagged by David Douard