Release apertis-update-manager version 0.2020.23

Signed-off-by: Denis Pynkin <denis.pynkin@collabora.com>

debian/changelog

+apertis-update-manager (0.2020.23) apertis; urgency=medium
+
+  * Adding DryRunMode method
+  * updatectl: add option '--dry-run'
+  * Allow to check OTA upgrades availability
+  * Fix the OTA upgrade progress
+  * Allow to try the static delta without an upgrade
+  * Allow to change the OTA polling time
+  * updatectl: allow to set polling time
+
+ -- Denis Pynkin <denis.pynkin@collabora.com>  Sun, 21 Feb 2021 21:51:29 +0300
+
 apertis-update-manager (0.2020.22) apertis; urgency=medium
 
   * fix: Clean-up loop device from previous run