Updated debian changelog for version 1.0.0

debian/changelog

+swh.graph (1.0.0-1~swh1) unstable-swh; urgency=medium
+
+  * New upstream release 1.0.0     - (tagged by Antoine Pietri
+    <antoine.pietri1@gmail.com> on 2022-06-30 17:19:33 +0200)
+  * Upstream changes:     - version 1.0.0
+
+ -- Software Heritage autobuilder (on jenkins-debian1) <jenkins@jenkins-debian1.internal.softwareheritage.org>  Thu, 30 Jun 2022 15:34:59 +0000
+
 swh.graph (0.5.2-1~swh2) unstable-swh; urgency=medium
 
   * Fix debian/rules and bump new version