CHANGELOG.md in aws-sdk-ec2-1.399.0 vs CHANGELOG.md in aws-sdk-ec2-1.400.0

@@ -1,7 +1,12 @@
 Unreleased Changes
 ------------------
 
+1.400.0 (2023-08-21)
+------------------
+
+* Feature - The DeleteKeyPair API has been updated to return the keyPairId when an existing key pair is deleted.
+
 1.399.0 (2023-08-17)
 ------------------
 
 * Feature - Adds support for SubnetConfigurations to allow users to select their own IPv4 and IPv6 addresses for Interface VPC endpoints