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KCL 1.x end-of-support notice update (#1454)

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* Update README.md

Updated KCL v1 readme page

* Update CHANGELOG.md

Updated KCL 1.x changelog regarding the KCL 1.x end-of-support notice
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CHANGELOG.md
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# Changelog
### Announcement on March 13, 2025
Amazon Kinesis Client Library (KCL) 1.x will reach end-of-support on January 30, 2026. Accordingly, these versions will enter maintenance mode on April 17, 2025. During maintenance mode, AWS will provide updates only for critical bug fixes and security issues. Major versions in maintenance mode will not receive updates for new features or feature enhancements. If you’re using KCL 1.x, we recommend migrating to the latest versions. When migrating from KCL 1.x to 3.x, you will need to update interfaces and security credential providers in your application. For details about the end-of-support notice and required actions, see the following links:
* [AWS Blog: Announcing end-of-support for Amazon Kinesis Client Library 1.x and Amazon Kinesis Producer Library 0.x effective January 30, 2026](https://aws.amazon.com/blogs/big-data/announcing-end-of-support-for-amazon-kinesis-client-library-1-x-and-amazon-kinesis-producer-library-0-x-effective-january-30-2026/)
* [Kinesis documentation: KCL version lifecycle policy](https://docs.aws.amazon.com/streams/latest/dev/kcl-version-lifecycle-policy.html)
* [Kinesis documentation: Migrating from KCL 1.x to KCL 3.x](https://docs.aws.amazon.com/streams/latest/dev/kcl-migration-1-3.html)
### Latest Release (1.15.2 - Aug 14, 2024)
* [#1371](https://github.com/awslabs/amazon-kinesis-client/pull/1371) Fix a bug in debug and trace logging levels for worker
* [#1224](https://github.com/awslabs/amazon-kinesis-client/pull/1224) Modify RecordProcessorCheckpointer#advancePosition Metrics usage to ensure proper closure

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> [!IMPORTANT]
> # Kinesis Client Library (KCL) 1.x will reach end-of-support on January 30, 2026
> Amazon Kinesis Client Library (KCL) 1.x will reach end-of-support on January 30, 2026. Accordingly, these versions will enter maintenance mode on April 17, 2025. During maintenance mode, AWS will provide updates only for critical bug fixes and security issues. Major versions in maintenance mode will not receive updates for new features or feature enhancements. If you’re using KCL 1.x, we recommend migrating to the latest versions. When migrating from KCL 1.x to 3.x, you will need to update interfaces and security credential providers in your application. For details about the end-of-support notice and required actions, see the following links:
>
> * [AWS Blog: Announcing end-of-support for Amazon Kinesis Client Library 1.x and Amazon Kinesis Producer Library 0.x effective January 30, 2026](https://aws.amazon.com/blogs/big-data/announcing-end-of-support-for-amazon-kinesis-client-library-1-x-and-amazon-kinesis-producer-library-0-x-effective-january-30-2026/)
> * [Kinesis documentation: KCL version lifecycle policy](https://docs.aws.amazon.com/streams/latest/dev/kcl-version-lifecycle-policy.html)
> * [Kinesis documentation: Migrating from KCL 1.x to KCL 3.x](https://docs.aws.amazon.com/streams/latest/dev/kcl-migration-1-3.html)
# Bugs in 1.14.0 version
We recommend customers to migrate to 1.14.1 to avoid [known bugs](https://github.com/awslabs/amazon-kinesis-client/issues/778) in 1.14.0 version