Update CHANGELOG.md

Author: cristianoc

CHANGELOG.md

@@ -16,7 +16,7 @@
 
 - Introduce experimental uncurried by default mode. Can be turned on mid-file by adding standalone annotation `@@uncurried`. For experimentation only. https://github.com/rescript-lang/rescript-compiler/pull/5796
 
-- Adding `@@toUncurried` to the file and reformat will convert to uncurried syntax
+- Adding `@@toUncurried` to the file and reformat will convert to uncurried syntax https://github.com/rescript-lang/rescript-compiler/pull/5800
 
 #### :boom: Breaking Change