Update CHANGELOG.md

Co-authored-by: Malte Sander <contact@maltesander.com>

Author: sbernauer

CHANGELOG.md

@@ -11,7 +11,7 @@ All notable changes to this project will be documented in this file.
 
 ### Changed
 
-- BREAKING: The per-rolegroup services now only serves the HTTP port and has a `-headless` suffix to better indicate there
+- BREAKING: The per-rolegroup services now only serves the HTTP port and has a `-headless` suffix to better indicate their
   purpose and to be consistent with other operators ([#748]).
 - BREAKING: The per-role server service is now prefixed with `-server` to be consistent with other operators ([#748]).