Replace docs.microsoft.com links with learn.microsoft.com to avoid redirect (301)

**This is a Feature Request**

**What would you like to be added**

All `docs.microsoft.com` links in the English Kubernetes website documentation should be updated to `learn.microsoft.com` links.
Currently, many links still point to the old `docs.microsoft.com` domain, but these URLs respond with an HTTP 301 redirect to `learn.microsoft.com`. Updating the links in the source content will make them future-proof and remove unnecessary redirects.

**Why is this needed**

docs.microsoft.com has been deprecated and now redirects to `learn.microsoft.com`.
Keeping outdated links may cause long-term maintenance issues if Microsoft changes their redirect rules.

A quick search shows more than 100 occurrences of `docs.microsoft.com` in the kubernetes/website repository, so a systematic fix is needed.

**Comments**

```bash
$ curl --head https://docs.microsoft.com/virtualization/windowscontainers/manage-containers/container-security
HTTP/2 301
server: AkamaiGHost
content-length: 0
location: https://learn.microsoft.com/virtualization/windowscontainers/manage-containers/container-security
```

Reference search result:
https://cs.k8s.io/?q=docs.microsoft.com&i=nope&literal=nope&files=content%2Fen&excludeFiles=&repos=kubernetes/website