Mention the addition of __dir__ in the changelog

Author: cpsievert

CHANGELOG.md

@@ -19,6 +19,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 * Client data values (e.g., url info, output sizes/styles, etc.) can now be accessed in the server-side Python code via `session.clientdata`, which is collection of reactive `Inputs`. For example, `session.clientdata.url_search()` reactively reads the URL search parameters. See [this PR](https://github.com/posit-dev/py-shiny/pull/1832) for a more complete example. (#1832)
 
+* Available `input` ids can now be listed via `dir(input)`. This also works on the new `session.clientdata` object. (#1832)
+
 ### Bug fixes
 
 * `ui.Chat()` now correctly handles new `ollama.chat()` return value introduced in `ollama` v0.4. (#1787)