Update README.md

Author: dracony

README.md

@@ -485,7 +485,7 @@ return array(
                 'property' => 'articles'
             ),
 
-            'itemOptions' => array(
+            'itemsOptions' => array(
 
                 // the name of the property added to items
                 // e.g. $article->category()
@@ -634,6 +634,8 @@ return array(
                 'property' => 'task'
             ),
 
+            // note it's 'itemOptions' here
+            // but 'itemsOptions' for One To Many
             'itemOptions' => array(
 
                 // the name of the property added to items
@@ -1026,4 +1028,4 @@ $topic->replies[2] = $reply;
 
 $exists = isset($topic->replies[2]);
 unset($topic->replies[2]);
-```
+```