fix: correct deprecated settings

Author: ctron

docusaurus.config.ts

@@ -22,7 +22,12 @@ const config: Config = {
   projectName: "trustification.github.io", // Usually your repo name.
 
   onBrokenLinks: "throw",
-  onBrokenMarkdownLinks: "warn",
+
+  markdown: {
+    hooks: {
+      onBrokenMarkdownLinks: "warn",
+    }
+  },
 
   // Even if you don't use internationalization, you can use this field to set
   // useful metadata like html lang. For example, if your site is Chinese, you