Kserve version v0.16 is not updated in installation doc

I see the Kserve installation guide is bit incorrect. I am trying to install v0.16 but the page is still referring to v0.15.
We need to fix this.

<img width="1848" height="1105" alt="Image" src="https://github.com/user-attachments/assets/e3d37486-0473-42b4-9921-36f8947c47c2" />