Updated debian changelog for version 6.2.0

debian/changelog

+swh-model (6.2.0-1~swh1) unstable-swh; urgency=medium
+
+  * New upstream release 6.2.0     - (tagged by Valentin Lorentz
+    <vlorentz@softwareheritage.org> on 2022-04-27 18:36:27 +0200)
+  * Upstream changes:     - v6.2.0     - * Add missing
+    `content_git_object`     - * test/pre-commit maintenance
+
+ -- Software Heritage autobuilder (on jenkins-debian1) <jenkins@jenkins-debian1.internal.softwareheritage.org>  Wed, 27 Apr 2022 16:40:00 +0000
+
 swh-model (6.1.0-1~swh1) unstable-swh; urgency=medium
 
   * New upstream release 6.1.0     - (tagged by David Douard