Update CHANGELOG

Author: Michele Mancioppi

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased](https://github.com/open-telemetry/opentelemetry-python/compare/v1.11.1-0.30b1...HEAD)
 
+- Implement 'process.runtime.{name,version,description}' resource attributes
+  ([#2660](https://github.com/open-telemetry/opentelemetry-python/pull/2660))
 - Move Metrics API behind internal package
   ([#2651](https://github.com/open-telemetry/opentelemetry-python/pull/2651))