Update changes.txt

Author: rouilj

CHANGES.txt

@@ -23,6 +23,10 @@ Features:
   when using display or specification subcommands. (John Rouillard)
 - add -P pragma=value command line option to roundup-admin. Allows
   setting pragmas when using non-interactive mode. (John Rouillard)
+- issue685275 - add pragma show_retired to control display of retired
+  items when using list/table. Add pragma display_header to print
+  headers for display command. Header displays designator and
+  retired/active status.
 
 2023-07-13 2.3.0