docs: link to eks steps from aws section (coder#17646)

closes coder#17634

---------

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: EdwardAngert <17991901+EdwardAngert@users.noreply.github.com>

Author: EdwardAngert

docs/install/cloud/index.md

@@ -10,10 +10,13 @@ cloud of choice.
 We publish an EC2 image with Coder pre-installed. Follow the tutorial here:
 
 - [Install Coder on AWS EC2](./ec2.md)
+- [Install Coder on AWS EKS](../kubernetes.md#aws)
 
 Alternatively, install the [CLI binary](../cli.md) on any Linux machine or
 follow our [Kubernetes](../kubernetes.md) documentation to install Coder on an
-existing EKS cluster.
+existing Kubernetes cluster.
+
+For EKS-specific installation guidance, see the [AWS section in Kubernetes installation docs](../kubernetes.md#aws).
 
 ## GCP