d/changelog: Bump new release to fix build

Related to T3053

debian/changelog

+swh-storage (0.23.0-1~swh2) unstable-swh; urgency=medium
+
+  * Fix dependency issue
+
+ -- Antoine R. Dumont (@ardumont) <ardumont@softwareheritage.org>  Tue, 16 Feb 2021 14:34:57 +0100
+
 swh-storage (0.23.0-1~swh1) unstable-swh; urgency=medium
 
   * New upstream release 0.23.0     - (tagged by Antoine R. Dumont

[Phabricator Migration user]

Some references in the commit message have been migrated:

• T3053 is now swh/infra/sysadm-environment#3053 (closed)