update changelog

Author: naphatkrit

CHANGELOG.md

@@ -15,6 +15,7 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 ### Fixed
 
 - Fix `StreamClientInterceptor` in `go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc` to end the spans synchronously. (#4537)
+- Fix data race in stats handlers when processing messages received and sent metrics in `go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc`. (#4577)
 
 ## [1.21.0/0.46.0/0.15.0/0.1.0] - 2023-11-10