Update changelog for 2.5.0 (#19030)

Author: emlowe

CHANGELOG.md

@@ -6,6 +6,22 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project does not yet adhere to [Semantic Versioning](https://semver.org/spec/v2.0.0.html)
 for setuptools_scm/PEP 440 reasons.
 
+## 2.5.0 Chia blockchain 2024-12-12
+
+## What's Changed
+
+### Added
+
+- Implemented CHIP-36: Introduced new soft-fork with CLVM `keccak256` operator
+
+### Changed
+
+- Bump `chia_rs` to `0.16.0`
+
+### Removed
+
+- Python 3.8 support has been removed
+
 ## 2.4.4 Chia blockchain 2024-10-15
 
 ## What's Changed