Add comment about why we add implicit pagination

strawberry_django/pagination.py

@@ -346,6 +346,7 @@ def get_queryset(
 
         # Add implicit pagination if this field is not a list
         # that way when first() / get() is called on the QuerySet it does not cause extra queries
+        # and we don't prefetch more than necessary
         if not pagination and not (
             self.is_list or self.is_paginated or self.is_connection
         ):