update changelog

Author: mununki

CHANGELOG.md

@@ -37,6 +37,7 @@ These are only breaking changes for unformatted code.
 #### :bug: Bug Fix
 
 - Fix issue where uncurried was not supported with pipe https://github.com/rescript-lang/rescript-compiler/pull/5803
+- Fix issue where optional field in the inlined record caused the type error https://github.com/rescript-lang/rescript-compiler/pull/5827
 
 #### :nail_care: Polish