fix path of content config file

src/content.config.ts

@@ -1,6 +1,7 @@
 import { defineCollection } from 'astro:content';
+import { docsLoader } from '@astrojs/starlight/loaders';
 import { docsSchema } from '@astrojs/starlight/schema';
 
 export const collections = {
-  docs: defineCollection({ schema: docsSchema() }),
+  docs: defineCollection({ loader: docsLoader(), schema: docsSchema() }),
 };