[Doc] Update required for outdated link in kubernetes doc (deep-dive/resource-scheduling /kubernetes.md)

[MuhtasimTanmoy]

Change Request

This doc deep-dive/resource-scheduling/kubernetes.md contains an outdated link in the following section which is no longer available.

The outdated link is available in the Reference section.

1. ...
2. ...
3. How does Kubernetes' scheduler work
4. ...

Fix

This https://github.com/tikv/website/pull/344 should solve it.