Updated debian changelog for version 0.3.0

debian/changelog

+swh-loader-cvs (0.3.0-1~swh1) unstable-swh; urgency=medium
+
+  * New upstream release 0.3.0     - (tagged by Antoine R. Dumont
+    (@ardumont) <ardumont@softwareheritage.org> on 2022-05-11 09:07:04
+    +0200)
+  * Upstream changes:     - v0.3.0     - cvs.loader: Decrease log level
+    verbosity to debug     - add strict asyncio_mode in pytest.ini     -
+    add missing sentry captures
+
+ -- Software Heritage autobuilder (on jenkins-debian1) <jenkins@jenkins-debian1.internal.softwareheritage.org>  Wed, 11 May 2022 07:10:34 +0000
+
 swh-loader-cvs (0.2.2-1~swh1) unstable-swh; urgency=medium
 
   * New upstream release 0.2.2     - (tagged by Antoine Lambert