Update CHANGELOG.md

Signed-off-by: Lee Smet <lee.smet@hotmail.com>

Author: LeeSmet

CHANGELOG.md

@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- On linux, the TUN interface now supports GSU/GRO (TSO and optionally USO on
+  linux 6.2+), improving throughput and lowering CPU utilization under heavy load.
+
 ## [0.7.6] - 2026-04-21
 
 ### Added