Updated CHANGELOG.md

Author: ekcoh

Packages/com.unity.inputsystem/CHANGELOG.md

@@ -18,7 +18,9 @@ however, it has to be formatted properly to pass verification tests.
 ### 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)
 - Fix documentation error in file AndroidGameController.cs mentioning a wrong controller. [DOCATT-9806]
-
+- Deferred auto-registration of processors, interactions and composite binding types referenced by `InputActionAsset`
+  to only happen once when an unresolved type reference is found in an action definition. This avoids reflective
+  type loading from assemblies for all cases where the Input System is not extended. (ISXB-1766).
 
 ## [1.16.0] - 2025-11-10