Updated changelog and package version for Netcode in anticipation of v2.7.0 release

Author: svc-netcode-sdk

com.unity.netcode.gameobjects/CHANGELOG.md

@@ -6,7 +6,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 
 Additional documentation and release notes are available at [Multiplayer Documentation](https://docs-multiplayer.unity3d.com).
 
-## [Unreleased]
+## [2.7.0] - 2025-10-27
 
 ### Added
 
@@ -43,12 +43,6 @@ Additional documentation and release notes are available at [Multiplayer Documen
 - Fixed issue where the disconnect event and provided message was too generic to know why the disconnect occurred. (#3551)
 - Exception when the network prefab list in the network manager has uninitialized elements. (#3739)
 
-### Security
-
-
-### Obsolete
-
-
 ## [2.6.0] - 2025-10-12
 
 ### Added