Modify the changelog

Author: Marchma0

CHANGELOG.md

@@ -31,6 +31,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 Attention: The newest changes should be on top -->
 
 ### Added
+- ENH: Add thrustcurve api integration to retrieve motor eng data [#870](https://github.com/RocketPy-Team/RocketPy/pull/870)
 
 - ENH: Custom Exception errors and messages [#285](https://github.com/RocketPy-Team/RocketPy/issues/285)