d/changelog: Bump new release

Related to T3079

debian/changelog

+swh-auth (0.3.0-1~swh2) unstable-swh; urgency=medium
+
+  * Add python3-swh.auth.django build package
+  * Bump new release
+
+ -- Antoine R. Dumont (@ardumont) <ardumont@softwareheritage.org>  Tue, 09 Mar 2021 15:26:58 +0100
+
 swh-auth (0.3.0-1~swh1) unstable-swh; urgency=medium
 
   * New upstream release 0.3.0     - (tagged by Antoine R. Dumont

[Phabricator Migration user]

Some references in the commit message have been migrated:

• T3079 is now swh/meta#3079 (closed)