CHANGELOG.md in aws-sdk-rds-1.220.0 vs CHANGELOG.md in aws-sdk-rds-1.221.0

@@ -1,7 +1,12 @@
 Unreleased Changes
 ------------------
 
+1.221.0 (2024-03-07)
+------------------
+
+* Feature - Updates Amazon RDS documentation for io2 storage for Multi-AZ DB clusters
+
 1.220.0 (2024-03-06)
 ------------------
 
 * Feature - Updated the input of CreateDBCluster and ModifyDBCluster to support setting CA certificates. Updated the output of DescribeDBCluster to show current CA certificate setting value.