Update 2.search.md

Author: GautierDele

content/2.endpoints/2.search.md

@@ -418,7 +418,7 @@ The type could be one of these:
 For the `exists` and `count` operation you must not specify the field since these aggregates don't base themselves on a column.
 ::
 
-### Aliases
+#### Aggregates aliases
 
 You may optionally define an alias for your aggregate using the `alias` method. This allows you to customize the name of the aggregate column in the response, instead of relying on Laravel's default naming.