Update CHANGELOG

Author: nunomaduro

CHANGELOG.md

@@ -1,11 +1,19 @@
 # Release Notes
 
-## [Unreleased](https://github.com/laravel/boost/compare/v1.2.1...main)
+## [Unreleased](https://github.com/laravel/boost/compare/v1.3.0...main)
 
 ## [v1.2.0](https://github.com/laravel/boost/compare/v1.1.5...v1.2.0) - 2025-09-18
 
 * uses latest version of laravel mcp
 
+## [v1.3.0](https://github.com/laravel/boost/compare/v1.2.1...v1.3.0) - 2025-09-30
+
+### What's Changed
+
+* [1.x] Adds `boost:update` + allows package authors to publish guidelines by [@nunomaduro](https://github.com/nunomaduro) in https://github.com/laravel/boost/pull/277
+
+**Full Changelog**: https://github.com/laravel/boost/compare/v1.2.1...v1.3.0
+
 ## [v1.2.1](https://github.com/laravel/boost/compare/v1.1.5...v1.2.1) - 2025-09-23
 
 ### What's Changed