Update NEWS.md for version 0.6.10 release

Author: JordiManyer

NEWS.md

@@ -5,6 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.6.10] - 2026.02.17
+
+- Enhance performance `fill!`
+- Enhance performance of adjoint `mul!`
+
 ## [0.6.9] - 2025.03.15
 
 ### Added