docs: update findSurround usage (#1609)

docs/content/4.api/2.composables/1.query-content.md

@@ -168,22 +168,23 @@ const firstArticle = await queryContent('articles').findOne()
   - Type: `{ before: number, after: number }`{lang=ts}
   - Default: `{ before: 1, after: 1 }`{lang=ts}
 
-Get previous and next results around a specific path.
+Get previous and next results around the path. The path should be full path of the target content.
 
 You will always obtain an array of fixed length filled with the matching document or null.
 
 ```ts
-const [prev, next] = await queryContent('articles')
+const [prev, next] = await queryContent()
   .only(['_path', 'title'])
   .sort({ date: 1})
   .where({ isArchived: false })
-  .findSurround('article-2')
+  .findSurround('/articles/article-2')
 
 // Returns
 [
   {
     title: 'Article 1',
-    path: 'article-1'
+    _path: '/articles/article-1'
+    //...
   },
   null // no article-3 here
 ]