Why does nuxt/content not work when enabling routeRules in next.config.ts?

[artiely]

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When enabling routeRules in next.config.ts, nuxt/content does not work. I specified the path, but it still doesn't work.

// routeRules: {
//   '/docs/**': { ssr: true },
//   '/admin/**': { ssr: true },
//   '/': { prerender: true },
//   '/api/**': { proxy: 'http://localhost:3000' }
// },

The content directory is content/docs/about-us.md.