improve readme

README.md

@@ -45,12 +45,12 @@ $Base->find('user')->whereIn('id', [1, 2])->update(['is_verified' => 1]);
 $Base->find('user')->whereNull('location')->count();
 ```
 
-Relationships:
+Handle relationships:
 ```php
 # read all users that have a featured post
 $Base->find('user')->has('post')->whereEqual('post.is_featured', 1)->read();
-# read all posts that belong to user #123 in an order based on title
-$Base->find('post')->belongsTo('user')->whereEqual('user.id', 123)->orderAsc('post.title')->readRecord();
+# read the last post of user #123
+$Base->find('post')->belongsTo('user')->whereEqual('user.id', 123)->orderDesc('post.id')->readRecord();
 # read the titles of the posts that have a "php" tag
 $Base->find('post')->hasAndBelongsTo('tag')->whereEqual('tag.name', 'php')->readFields('title');
 ```