Add documentation for EKS Pod Identity support

Hello,

I noticed in issue #772 that [EKS Pod Identity](https://docs.aws.amazon.com/eks/latest/userguide/pod-identities.html) support seems to be already implemented.

I’d like to see this reflected on the documentation website to help other users.

Is this confirmed as fully supported? If so, I’m happy to submit a PR to update the docs if you can point me to the right file.

检查 issue #772 和文档网站，以确认是否完全支持 EKS Pod Identity，并确定相关文档页面。更新该页面以描述受支持的集成，然后验证已发布的文档是否准确反映了实现。

由索引模型根据 Issue 内容生成。