Add changelog

Author: xrmx

CHANGELOG.md

@@ -23,6 +23,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   ([#3266](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3266))
 - `opentelemetry-instrumentation-botocore` Add support for GenAI choice events
   ([#3275](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3275))
+- `opentelemetry-instrumentation-botocore` Add support for GenAI tool events
+  ([#3302](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3302))
 - `opentelemetry-instrumentation` make it simpler to initialize auto-instrumentation programmatically
   ([#3273](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3273))