[CLEANUP] Add missing PR number to changelog (#626)

(#413)

Author: JakeQZ

CHANGELOG.md

@@ -9,7 +9,7 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 
 ### Changed
 
-- Improve performance of Value::parseValue with many delimiters by refactoring to remove array_search()
+- Improve performance of Value::parseValue with many delimiters by refactoring to remove array_search() (#413)
 
 ### Deprecated