[DOCS] Fix typo in the changelog (MyIntervals#491)

Author: oliverklee

CHANGELOG.md

@@ -22,7 +22,7 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 
 ### Fixed
 
-- Fix PHP notice caused by parsing invalid color values having less than 6 charachters (#485)
+- Fix PHP notice caused by parsing invalid color values having less than 6 characters (#485)
 - Fix (regression) failure to parse at-rules with strict parsing (#456)
 
 ## 8.5.0