Update CHANGELOG

Author: pridhi-arora

CHANGELOG.md

@@ -22,6 +22,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fix Flask instrumentation to only close the span if it was created by the same thread.
   ([#1654](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/1654))
 
+### Added
+
+- `opentelemetry-instrumentation-threading` Add instrumentation for python threading module
+   ([#1582](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/1582))****
+
 ## Version 1.16.0/0.37b0 (2023-02-17)
 
 ### Added