Update README.md

Added message about end of developer support and plans to Archive repo by end of 2025.

Author: archikierstead

README.md

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 # ATTENTION
 
+**ASEA developer support has ended, and the ASEA github repo will be marked Archived (readonly) by the end of 2025.**
+
 The [Landing Zone Accelerator (LZA) on AWS solution](https://aws.amazon.com/solutions/implementations/landing-zone-accelerator-on-aws/) is now the recommended solution for organizations seeking to automate the deployment of a new high compliance AWS Environment.
 
 The LZA v1.3 release (03/2023) focused on delivering AWS Secure Environment Accelerator (ASEA) feature parity and delivered both [CCCS Cloud Medium](https://aws.amazon.com/solutions/implementations/landing-zone-accelerator-on-aws/#Support_for_specific_regions_and_industries) and [Trusted Secure Enclave Sensitive Edition](https://aws.amazon.com/solutions/implementations/landing-zone-accelerator-on-aws/#Support_for_specific_regions_and_industries) sample configuration files. These samples deliver similar outcomes to the ASEA sample configuration file.
 
-The LZA team has developed an automated upgrade from ASEA to LZA and it is now **generally available** with ASEA v1.6.0 and LZA v1.11.0. Upgrades from ASEA to LZA must occur before end of Q3 2025 (September 30, 2025). **The documentation for the ASEA to LZA upgrade is available in the AWS Secure Environment Accelerator [guide on GitHub pages](https://aws-samples.github.io/aws-secure-environment-accelerator/latest/lza-upgrade/)** and the upgrade tools are available in the [reference-artifacts/Custom-Scripts/lza-upgrade](./reference-artifacts/Custom-Scripts/lza-upgrade/) folder of this repository.
+The LZA team has developed an automated upgrade from ASEA to LZA and it is now **generally available** with ASEA v1.6.5 and LZA v1.11.0+. Upgrades from ASEA to LZA must occur before end of Q3 2025 (September 30, 2025). **The documentation for the ASEA to LZA upgrade is available in the AWS Secure Environment Accelerator [guide on GitHub pages](https://aws-samples.github.io/aws-secure-environment-accelerator/latest/lza-upgrade/)** and the upgrade tools are available in the [reference-artifacts/Custom-Scripts/lza-upgrade](./reference-artifacts/Custom-Scripts/lza-upgrade/) folder of this repository.
 
 Please reach out to your AWS Account Team with any questions.