Add changelog entry for multi-URL traverse support

Updated CHANGES.md to document the enhancement to fedify lookup command that
now supports multiple URLs with the -t/--traverse option.

#408
#449

Author: dahlia

CHANGES.md

@@ -84,8 +84,14 @@ To be released.
         to trash and continue the initialization from new created directory.
      -  Ask again if some options is not specified or invalid.
 
+ -  The `fedify lookup` command now supports multiple URLs with the
+    `-t`/`--traverse` option, allowing users to traverse multiple collections
+    in a single command.  [[#408], [#449] by Jiwon Kwon]
+
 [#397]: https://github.com/fedify-dev/fedify/issues/397
+[#408]: https://github.com/fedify-dev/fedify/issues/408
 [#435]: https://github.com/fedify-dev/fedify/issues/435
+[#449]: https://github.com/fedify-dev/fedify/pull/449
 
 
 Version 1.9.0