Updated the changelog

Author: Monta120

CHANGELOG.md

@@ -32,8 +32,7 @@ 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)
+- Add caching to ThrustCurve API requests to avoid repeated downloads for the same motor (#878
 
 ### Changed