update changelog

Author: K-Tone

Packages/com.unity.inputsystem/CHANGELOG.md

@@ -13,6 +13,7 @@ however, it has to be formatted properly to pass verification tests.
 ### Changed
 - Project-Wide Input Actions support can no longer be disabled (removed the UNITY_INPUT_SYSTEM_PROJECT_WIDE_ACTIONS define). (ISX-2397)
 - Removed code that had to do with Unity versions older than Unity 2022.3 LTS. (ISX-2396)
+- Auto-save on focus lost can no longer be compiled out (ISX-2397)
 
 ### Fixed
 - An issue where a UITK MouseEvent was triggered when changing from Scene View to Game View in the Editor has been fixed. [ISXB-1671](https://issuetracker.unity3d.com/product/unity/issues/guid/ISXB-1671)