Add changelog

Author: xrmx

CHANGELOG.md

@@ -44,6 +44,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   ([#4058](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/4058))
 - `opentelemetry-instrumentation-django`: Replace SpanAttributes with semconv constants where applicable 
   ([#4059](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/4059))
+- `opentelemetry-instrumentation-botocore`: Replace SpanAttributes with semconv constants where applicable 
+  ([#4063](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/4063))
 
 ## Version 1.39.0/0.60b0 (2025-12-03)