[8.x] Clarify that lazy flattens the chunks

eloquent.md

@@ -356,7 +356,7 @@ Flight::where('departed', true)
 <a name="streaming-results-lazily"></a>
 ### Streaming Results Lazily
 
-The `lazy` method works similarly to [the `chunk` method](#chunking-results) in the sense that it executes the query in chunks. However, instead of passing each chunk into a callback, the `lazy` method returns a [`LazyCollection`](/docs/{{version}}/collections#lazy-collections) of Eloquent models, which lets you interact with the results as a single stream:
+The `lazy` method works similarly to [the `chunk` method](#chunking-results) in the sense that, behind the scenes, it executes the query in chunks. However, instead of passing each chunk directly into a callback as is, the `lazy` method returns a flattened [`LazyCollection`](/docs/{{version}}/collections#lazy-collections) of Eloquent models, which lets you interact with the results as a single stream:
 
 ```php
 use App\Models\Flight;