chore: add changelog entry

Author: mcanouil

news/changelog-1.9.md

@@ -79,6 +79,7 @@ All changes included in 1.9:
 - ([#13570](https://github.com/quarto-dev/quarto-cli/pull/13570)): Replace Twitter with Bluesky in default blog template and documentation examples. New blog projects now include Bluesky social links instead of Twitter.
 - ([#13716](https://github.com/quarto-dev/quarto-cli/issues/13716)): Fix draft pages showing blank during preview when pre-render scripts are configured.
 - ([#13847](https://github.com/quarto-dev/quarto-cli/pull/13847)): Open graph title with markdown is now processed correctly. (author: @mcanouil)
+- ([#12667](https://github.com/quarto-dev/quarto-cli/pull/12667)): Add support for multiple category selection in listings using Ctrl/Cmd+click. Selected categories are persisted in the URL hash as comma-separated values. (author: @mcanouil)
 
 ### `book`