Document changes and release 1.21.22pureos1

debian/changelog

+dpkg (1.21.22pureos1) crimson; urgency=medium
+
+  * Upload to crimson
+  * Remaining relevant changes: Dpkg/Vendor/PureOS.pm
+
+ -- Guido Günther <agx@sigxcpu.org>  Tue, 13 Jun 2023 12:34:33 +0200
+
 dpkg (1.21.22) unstable; urgency=medium
   [ Guillem Jover ]