Update safely-drain-node.md

[Shubhdeep02]

explanation on "kubectl drain" command

[netlify[bot]]

✅ Pull request preview available for checking

Built without sensitive environment variables

Name	Link
🔨 Latest commit	691d0af817b0079f69994ee0e020c0b7d15b0cf7
🔍 Latest deploy log	https://app.netlify.com/sites/kubernetes-io-main-staging/deploys/669408989398a300081d59bb
😎 Deploy Preview	https://deploy-preview-45485--kubernetes-io-main-staging.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: Once this PR has been reviewed and has the lgtm label, please assign nate-double-u for approval. For more information see the Kubernetes Code Review Process.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• content/en/OWNERS

Approvers can indicate their approval by writing /approve in a comment Approvers can cancel approval by writing /approve cancel in a comment

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: Once this PR has been reviewed and has the lgtm label, please assign nate-double-u for approval. For more information see the Kubernetes Code Review Process.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• content/en/docs/OWNERS

Approvers can indicate their approval by writing /approve in a comment Approvers can cancel approval by writing /approve cancel in a comment

[Shubhdeep02]

@tengqm is it fine now?