Finalize changelog for 3.1.5-5pureos3

debian/changelog

+openexr (3.1.5-5pureos3) crimson; urgency=medium
+
+  * ci: Use landing to allow bootstrapping crimson
+
+ -- Evangelos Ribeiro Tzaras <evangelos.tzaras@puri.sm>  Thu, 15 Jun 2023 19:04:41 +0200
+
 openexr (3.1.5-5pureos2) crimson; urgency=medium
 
   * d/gbp.conf: Set debian-branch to pureos/latest