DET-374: Added CHANGELOG entry.

Author: pwardecki-sumo

CHANGELOG.md

@@ -1,5 +1,8 @@
 ## 2.28.1 (Unreleased)
 
+BUG FIXES:
+* Minor fixes enabling proper resource import for CSE Rules (`severity`, `severity_mapping`, `aggregation_functions`). (GH-606)
+
 ## 2.28.0 (November 23, 2023)
 FEATURES:
 * resource/sumologic_monitor: Added support for setting `time_zone` at Monitor level for notifications content (GH-586)