fix code

Author: shuangela

source/crud/query/find.txt

@@ -73,8 +73,8 @@ which you can print, as shown in the following example:
    :copyable: true
 
    .. input:: /includes/read/retrieve.kt
-      :start-after: start-find-iterate
-      :end-before: end-find-iterate
+      :start-after: start-find-one-print
+      :end-before: end-find-one-print
       :language: kotlin
       :dedent: