Update CHANGELOG.md

Author: cristianoc

CHANGELOG.md

@@ -22,6 +22,7 @@
 
 #### :bug: Bug Fix
 
+- Fix issue in formatting JSX spread props https://github.com/rescript-lang/syntax/pull/644
 - Fix pretty printer where it would print doc comments on the same line as other attributes https://github.com/rescript-lang/syntax/pull/642
 - Fix location issue in error messages with JSX V4 where the body of the component is an application https://github.com/rescript-lang/syntax/pull/633
 - Fix issue where the printer would omit attributes for `->` and `|>` https://github.com/rescript-lang/syntax/pull/629