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* api-change:``bedrock-agent-runtime``: This release adds support to provide guardrail configuration and modify inference parameters that are then used in RetrieveAndGenerate API in Agents for Amazon Bedrock.
* api-change:``pinpoint``: This release adds support for specifying email message headers for Email Templates, Campaigns, Journeys and Send Messages.
* api-change:``route53resolver``: Update the DNS Firewall settings to correct a spelling issue.
* api-change:``ssm-sap``: Added support for application-aware start/stop of SAP applications running on EC2 instances, with SSM for SAP
* api-change:``verifiedpermissions``: Adds policy effect and actions fields to Policy API's.