Update Changelog.md (#1125)

Update Changelog.md

Author: MarcoRossignoli

Documentation/Changelog.md

@@ -14,7 +14,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 -Fix incorrect branch coverage with await using [#1111](https://github.com/coverlet-coverage/coverlet/pull/1111) by https://github.com/alexthornton1 
 
 ### Added
--Support deterministic reports [#1113](https://github.com/coverlet-coverage/coverlet/pull/1113)
+-Support deterministic reports [#1113](https://github.com/coverlet-coverage/coverlet/pull/1113)  
+
+### Improvements
+-Implementation of Npath complexity for the OpenCover reports [#1058](https://github.com/coverlet-coverage/coverlet/pull/1058) by https://github.com/benjaminZale
 
 ## Release date 2021-02-21
 ### Packages