Updated debian changelog for version 6.5.0

debian/changelog

+swh-model (6.5.0-1~swh1) unstable-swh; urgency=medium
+
+  * New upstream release 6.5.0     - (tagged by Nicolas Dandrimont
+    <nicolas@dandrimont.eu> on 2022-09-26 18:11:53 +0200)
+  * Upstream changes:     - Release swh.model v6.5.0     - Bundle a lot
+    of performance improvements in swh.model.model.
+
+ -- Software Heritage autobuilder (on jenkins-debian1) <jenkins@jenkins-debian1.internal.softwareheritage.org>  Mon, 26 Sep 2022 16:16:05 +0000
+
 swh-model (6.4.1-1~swh1) unstable-swh; urgency=medium
 
   * New upstream release 6.4.1     - (tagged by Valentin Lorentz