update CHANGELOG

Author: Gui-FernandesBR

CHANGELOG.md

@@ -41,7 +41,7 @@ Attention: The newest changes should be on top -->
 
 ### Changed
 
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+- ENH: Refactor Flight class to improve time node handling and sensor/controllers [#843](https://github.com/RocketPy-Team/RocketPy/pull/843)
 
 ### Fixed