Updated change log.

Author: kmvanbrunt

CHANGELOG.md

@@ -108,6 +108,10 @@ prompt is displayed.
         - Individual commands can still be manually moved using the `with_category()` decorator.
         - For more details and examples, see the [Help](docs/features/help.md) documentation and the
           `examples/default_categories.py` file.
+    - `CommandSet` is now a generic class, which allows developers to parameterize it with their
+      specific`cmd2.Cmd`subclass (e.g.,`class MyCommandSet(CommandSet[MyApp]):`). This provides full
+      type hints and IDE autocompletion for `self._cmd` without needing to override and cast the
+      property.
 
 ## 3.5.0 (April 13, 2026)