CHANGELOG.md in aws-sdk-guardduty-1.90.0 vs CHANGELOG.md in aws-sdk-guardduty-1.91.0

@@ -1,7 +1,12 @@
 Unreleased Changes
 ------------------
 
+1.91.0 (2024-04-25)
+------------------
+
+* Feature - Code Generated Changes, see `./build_tools` or `aws-sdk-core`'s CHANGELOG.md for details.
+
 1.90.0 (2024-04-18)
 ------------------
 
 * Feature - Added IPv6Address fields for local and remote IP addresses