Update whats-new.rst - fix typo

Author: jeffriley

online-docs/pages/whats-new.rst

@@ -5,7 +5,7 @@ Following is a brief list of important updates to the COMPAS code.  A complete r
 
 **03.26.02 October 27, 2025**
 
-* Added option --USSN-kicks-overwrite-mandel-muller ; if set to true, use user-defined USSN kicks (as a fixed value) in lieu of the Mandel & Muller kick prescription for USSNe
+* Added option --USSN-kicks-override-mandel-muller ; if set to true, use user-defined USSN kicks (as a fixed value) in lieu of the Mandel & Muller kick prescription for USSNe
 * Replaced --scale-CHE-mass-loss-with-surface-helium-abundance with the more general --scale-mass-loss-with-surface-helium-abundance (applies to all MS stars, not just CHE stars)
 
 **03.26.00 September 2, 2025**