replace siteConfig.onBrokenMarkdownLinks by siteConfig.markdown.hook.onBrokenMarkdownLinks

[zhzhuang-zju]

What type of PR is this?
/kind cleanup

What this PR does / why we need it:
https://app.netlify.com/projects/karmada/deploys/69158ae7cb564600087b487e#L107-L108

3:39:16 PM: [WARNING] The `siteConfig.onBrokenMarkdownLinks` config option is deprecated and will be removed in Docusaurus v4.
3:39:16 PM: Please migrate and move this option to `siteConfig.markdown.hooks.onBrokenMarkdownLinks` instead.

Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:

[gemini-code-assist]

Summary of Changes

Hello @zhzhuang-zju, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request updates the Docusaurus configuration to align with upcoming changes in Docusaurus v4. It specifically addresses a deprecation warning by relocating the onBrokenMarkdownLinks option to its new designated path within the siteConfig.markdown.hooks object. This ensures the project remains compatible with future Docusaurus versions and resolves a build-time warning.

Highlights

• Docusaurus Configuration Update: Migrated the onBrokenMarkdownLinks configuration option from the top-level siteConfig to the new siteConfig.markdown.hooks structure, addressing a deprecation warning for Docusaurus v4.

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[gemini-code-assist]

Code Review

This pull request correctly addresses a deprecation warning in Docusaurus by migrating the onBrokenMarkdownLinks configuration. The change moves the setting from the root of the site configuration to markdown.hooks.onBrokenMarkdownLinks, which is the correct new location. The implementation is straightforward and accurate. I have no further comments.

[RainbowMango]

/lgtm
/approve

[karmada-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: RainbowMango

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