Update deprecated onBrokenMarkdownLinks config warning in Docusaurus v3.9.1 build

[ccamel]

Problem

During the build process with Docusaurus v3.9.1, the following warning is emitted:

Warning: The siteConfig.onBrokenMarkdownLinks config option is deprecated and will be removed in a future Docusaurus version.
Please migrate and move this option to siteConfig.markdown.hooks.onBrokenMarkdownLinks instead.

See the GitHub Actions log for details: https://github.com/axone-protocol/docs/actions/runs/18105930114/job/51520333696

---

Current Configuration

The deprecated option is set in docusaurus.config.js:

// https://github.com/axone-protocol/docs/blob/main/docusaurus.config.js
onBrokenMarkdownLinks: 'throw',

Proposed Solution

• Migrate the onBrokenMarkdownLinks config from the root level to siteConfig.markdown.hooks.onBrokenMarkdownLinks as suggested by the warning message.
• Test the build to confirm the warning is resolved.

References

• Docusaurus configuration documentation
• Workflow log with warning

Related code

docusaurus.config.js

// @ts-check
/** @type {import('@docusaurus/types').Config} */
const config = {
  ...
  onBrokenMarkdownLinks: 'throw',
  ...
  markdown: {
    mermaid: true
    // Move hooks config here as per Docusaurus config requirements
  },
  ...
};