added changelog

Author: ritamerkl

Packages/com.unity.inputsystem/CHANGELOG.md

@@ -24,6 +24,7 @@ however, it has to be formatted properly to pass verification tests.
 - Fixed pasting bindings into empty Input Action asset. [ISXB-1180](https://issuetracker.unity3d.com/product/unity/issues/guid/ISXB-1180)
 - Fixed missing '&' symbol in Control Scheme dropdown on Windows platform. [ISXB-1109](https://issuetracker.unity3d.com/product/unity/issues/guid/ISXB-1109)
 - Fixed icon scaling in Input Actions window.
+- Fixed an issue where removing the InputSystem package could lead to invalid input handling settings.
 
 ### Changed
 - Added back the InputManager to InputSystem project-wide asset migration code with performance improvement (ISX-2086).