Update the changelog for v0.5.0

Author: wilsonsilva

CHANGELOG.md

@@ -5,6 +5,18 @@ 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).
 
+## [0.5.0] - 2025-07-22
+
+### Added
+- Rails routing DSL for elegant JSON-RPC method mapping with support for namespaces and batch handling
+- New `JSONRPC::RoutesDsl` class for defining JSON-RPC routes within Rails applications
+- `JSONRPC::BatchConstraint` for routing JSON-RPC batch requests to dedicated controllers
+
+### Changed
+- Procedure registration now supports optional validation blocks (defaults to empty contract)
+- Simplified example configurations by removing unnecessary empty validation blocks
+- Enhanced Rails integration with automatic DSL registration via Railtie
+
 ## [0.4.0] - 2025-07-18
 
 ### Added
@@ -71,6 +83,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Helper methods for request and response processing
 - Examples for basic and advanced usage scenarios
 
+[0.5.0]: https://github.com/wilsonsilva/jsonrpc-middleware/compare/v0.4.0...v0.5.0
 [0.4.0]: https://github.com/wilsonsilva/jsonrpc-middleware/compare/v0.3.0...v0.4.0
 [0.3.0]: https://github.com/wilsonsilva/jsonrpc-middleware/compare/v0.2.0...v0.3.0
 [0.2.0]: https://github.com/wilsonsilva/jsonrpc-middleware/compare/v0.1.0...v0.2.0