(fix) Updated CHANGELOG.md to include v1.12.0 details

Author: aarmoa

CHANGELOG.md

@@ -2,11 +2,12 @@
 
 All notable changes to this project will be documented in this file.
 
-## [Unreleased] - 9999-99-99
-
-## [1.12.0] - 2025-11-10
+## [1.12.0] - 2025-11-10 
 ### Changed
 - Updated all compiled protos for compatibility with Injective core v1.17.0 and Indexer v1.17.16
+- Included the OpenNotionalCap in derivative markets
+- Added support for market orders creation with the MsgBatchUpdateOrders message
+- Support for order failure events and conditional orders trigger failures in the chainstrem updates
 
 ## [1.11.2] - 2025-09-24
 ### Added