restore original sidebar styling

[DeshDeepakKant]

This PR fixes the sidebar styling that was unintentionally modified by PR #109
(Improve website icons and styling).

Changes:

• Restore original sidebar appearance

Before:

After:

[kmesh-bot]

[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 kevin-wangzefeng 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:

• OWNERS

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

[netlify]

✅ Deploy Preview for kmesh-net ready!

Name	Link
🔨 Latest commit	6971319
🔍 Latest deploy log	https://app.netlify.com/sites/kmesh-net/deploys/67969d68a2619c0008f48389
😎 Deploy Preview	https://deploy-preview-114--kmesh-net.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.

[Murdock9803]

@DeshDeepakKant you can also push commits on the same branch that you used for the previous PR, to update any unintentional changes done 🙌

[hzxuzhonghu]

Can you elaborate why reverting this change

[DeshDeepakKant]

Can you elaborate why reverting this change

I wanted to inform you that I have raised another PR, #116, which includes the changes related to the sidebar styling fix. These changes are in the same branch.