debian: fix changelog (#3194)

Author: Saviq

debian/changelog

@@ -9,7 +9,7 @@ mir (2.16.3) UNRELEASED; urgency=medium
 
  -- Alan Griffiths <alan.griffiths@canonical.com>  Wed, 17 Jan 2024 09:40:21 +0000
 
-mir (2.16.1) UNRELEASED; urgency=medium
+mir (2.16.2) UNRELEASED; urgency=medium
 
   * Bugfix release:
     - Display with orientation: left/right flipped on arm64 (#3185)