(EKS): camelcase is converted to snake case in undesired scenarios in CDK Python API Ref

### Describe the issue

Using "api_version" as shown in the documentation for KubernetesManifests throws errors upon CDK deployment.

> namespace = cluster.add_manifest("my-namespace", {
"api_version": "v1", <--------------------------------------------------- Wrong way to specify apiVersion
"kind": "Namespace",
"metadata": {"name": "my-app"}
})

Correct/working argument is "apiVersion". Please replace the above in the documentation with the following:

> namespace = cluster.add_manifest("my-namespace", {
> "apiVersion": "v1", <-------------------------------------------------- Here is the change
> "kind": "Namespace",
> "metadata": {"name": "my-app"}
> })

AWS CDK - 2.4.5

Addendum: Other fields like `container_port` also throw errors unless specified as "containerPort"

### Links

https://docs.aws.amazon.com/cdk/api/v2/python/aws_cdk.aws_eks/KubernetesManifest.html

Start with the KubernetesManifest API reference linked in the issue and compare its documented Python examples with the working camelCase examples provided. Update the api_version example to apiVersion, check related fields such as container_port and containerPort, and confirm the corrected examples match the stated CDK deployment behavior.

Written by the indexing model from the issue text.