Version bump for buster to bullseye upgrades

2022.1/aims-desktop/aims-desktop-2022/debian/changelog

+aims-desktop (2:2022.21) bullseye; urgency=medium
+
+  * Version bump for upgrades from buster aims-desktop2:2020 to bullseye
+
+ -- Jan Groenewald <jan@aims.ac.za>  Wed, 01 Sep 2021 15:00:13 +0200
+
 aims-desktop (1:2022.20) bullseye; urgency=medium
 
   * Remove python-pip, python-setuptools, add python-is-python3