Mention amazon-sagemaker-codeserver in README?

A nice sample was published recently for getting [Code server](https://github.com/coder/code-server) running on SageMaker Studio - See the [Host Code Server on Amazon SageMaker blog post](https://aws.amazon.com/blogs/machine-learning/host-code-server-on-amazon-sagemaker/) and [aws-samples/amazon-sagemaker-codeserver repo](https://github.com/aws-samples/amazon-sagemaker-codeserver).

That sample also works via lifecycle configuration script, and includes its own scripts in the repository.

To keep **this** repository as a nice reference for cool/useful official sample lifecycle configurations in Studio, maybe I could suggest adding a section to the README linking to the other sample?

Perhaps it could be expanded later if other samples launch with significant LCConfig scripts but keep them in their own repositories rather than here.

Start with the repository README and review its existing organization of official sample lifecycle configurations. Add a section linking to the amazon-sagemaker-codeserver repository and the related AWS blog post; done means the new sample is clearly discoverable from the README.

Written by the indexing model from the issue text.