SUMO-237698: edit changelog

Author: ndhar-sumo

CHANGELOG.md

@@ -4,7 +4,7 @@ ENHANCEMENTS:
 * Added support for custom window sizes for the CSE Rules (Aggregation, Chain, Threshold). (GH-623)
 
 BUG FIXES:
-* Fix error while importing monitor having timeZone as `null` in its Email notification object ()
+* Fix error while importing monitor having timeZone as `null` in the Email notification object. (GH-637)
 
 ## 2.28.3 (March 5, 2024)