Update CHANGELOG.md

CHANGELOG.md

@@ -5,6 +5,29 @@ All notable changes to Zebra are 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).
 
+## [Zebra 2.0.0](https://github.com/ZcashFoundation/zebra/releases/tag/v2.0.0) - 2024-10-25
+
+This release brings full support for NU6.
+
+### Breaking Changes
+
+- Zebra now supports NU6 on Mainnet.
+- The JSON RPC endpoint has a cookie-based authentication enabled by default.
+
+### Added
+
+- NU6-related documentation ([#8949](https://github.com/ZcashFoundation/zebra/pull/8949))
+- A cookie-based authentication system for the JSON RPC endpoint ([#8900](https://github.com/ZcashFoundation/zebra/pull/8900), [#8965](https://github.com/ZcashFoundation/zebra/pull/8965))
+
+### Changed
+
+-  Set the activation height of NU6 for Mainnet and the network protocol version ([#8960](https://github.com/ZcashFoundation/zebra/pull/8960))
+
+### Contributors
+
+Thank you to everyone who contributed to this release, we couldn't make Zebra without you:
+@arya2, @gustavovalverde, @oxarbitrage and @upbqdn.
+
 ## [Zebra 2.0.0-rc.0](https://github.com/ZcashFoundation/zebra/releases/tag/v2.0.0-rc.0) - 2024-10-11
 
 This version is a release candidate for the Zcash NU6 network upgrade on the Mainnet. While this version does not yet include the NU6 Mainnet activation height or current protocol version, all required functionality and tests are in place.