Updated debian changelog for version 5.0.0

debian/changelog

+swh-model (5.0.0-1~swh1) unstable-swh; urgency=medium
+
+  * New upstream release 5.0.0     - (tagged by Valentin Lorentz
+    <vlorentz@softwareheritage.org> on 2022-03-16 10:33:49 +0100)
+  * Upstream changes:     - v5.0.0     - * Fix f-string     - * Fix
+    crash in check_entries.     - * Add missing __slots__ to
+    HashableObjectWithManifest     - * docs: Explain we prefer dir
+    SWHIDs over rev/rel.     - * Remove 'offset' and 'negative_utc'
+    arguments and make them optional     - * Remove deprecated property
+    'TimestampWithTimezone.offset'
+
+ -- Software Heritage autobuilder (on jenkins-debian1) <jenkins@jenkins-debian1.internal.softwareheritage.org>  Wed, 16 Mar 2022 09:38:26 +0000
+
 swh-model (4.4.0-1~swh1) unstable-swh; urgency=medium
 
   * New upstream release 4.4.0     - (tagged by Valentin Lorentz