add changelog

Author: WilliamArmst

CHANGELOG.md

@@ -43,6 +43,7 @@ Attention: The newest changes should be on top -->
 
 ### Fixed
 
+- BUG: Allow multiple sets of stochastic fins [#737](https://github.com/RocketPy-Team/RocketPy/pull/737)
 - BUG: forecast and reanalysis models - Update ECMWF dictionary values [#736](https://github.com/RocketPy-Team/RocketPy/pull/736)
 - BUG: forecast and reanalysis models - move wind_speed to correct position [#735](https://github.com/RocketPy-Team/RocketPy/pull/735)
 - BUG: Sideslip Angle and Damping Coefficient Calculation [#729](https://github.com/RocketPy-Team/RocketPy/pull/729)