Please add TiCDC related content

[yilongrong]

File: /release-1.4/zh/maintain-a-kubernetes-node.md

[Oreoxmt]

@csuzhangxc @hi-rustin PTAL

[csuzhangxc]

@grovecai @hi-rustin PTAL

[0xPoe]

What kind of content do we need to add?