Update CHANGELOG.md

Author: cristianoc

CHANGELOG.md

@@ -23,6 +23,7 @@
 - Fix issue with type environment for unified ops. https://github.com/rescript-lang/rescript/pull/7277
 - Fix completion for application with tagged template. https://github.com/rescript-lang/rescript/pull/7278
 - Fix error message for arity in the presence of optional arguments. https://github.com/rescript-lang/rescript/pull/7284
+- Fix issue in functors with more than one argument (which are curried): emit nested function always. https://github.com/rescript-lang/rescript/pull/7273
 
 # 12.0.0-alpha.8