Update CHANGELOG.md

Author: willmcgugan

CHANGELOG.md

@@ -18,6 +18,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ### Added
 - Added an interface for replacing prompt of an individual option in an `OptionList` https://github.com/Textualize/textual/issues/2603 
 - Added `DirectoryTree.reload_node` method https://github.com/Textualize/textual/issues/2757
+- Added widgets.Digit https://github.com/Textualize/textual/pull/3073
 
 ## [0.32.0] - 2023-08-03