Changelog for #6404 smartplaylist copy-paste fix

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: JOJ0

docs/changelog.rst

@@ -22,6 +22,11 @@ New features
   deprecate ``overwrite``.
 - :doc:`plugins/autobpm`: The "BPM already exists for item" log message can now
   be hidden with the ``--quiet`` flag.
+- :doc:`plugins/smartplaylist`: The list of available playlists shown when an
+  unknown playlist name is passed as an argument is now sorted alphabetically
+  and printed space-delimited and POSIX shell-quoted when required. This
+  makes it easier to copy and paste multiple playlists for further use in the
+  shell.
 
 Bug fixes
 ~~~~~~~~~