Add Changelog

Author: xrmx

CHANGELOG.md

@@ -15,6 +15,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - `opentelemetry-instrumentation-sqlalchemy` Update unit tests to run with SQLALchemy 2
   ([#2976](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/2976))
+- `opentelemetry-instrumentation-click`: new instrumentation to trace click commands
+  ([#2994](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/2994))
 
 ### Fixed