Update the CGANGELOG

Author: davep

CHANGELOG.md

@@ -17,6 +17,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ### Changed
 
 - ProgressBar won't show ETA until there is at least one second of samples https://github.com/Textualize/textual/pull/4316
+- `Input` waits until an edit has been made, after entry to the widget, before offering a suggestion https://github.com/Textualize/textual/pull/4335
 
 ## [0.53.1] - 2023-03-18