udpated docs

Author: DavertMik

docs/10-APITesting.md

@@ -105,7 +105,7 @@ If API endpoint accepts JSON you can use a `send` methods with `AsJson` suffix t
 $I->sendPostAsJson('/users', ['name' => 'old name']);
 $users = $I->sendGetAsJson('/users');
 $I->sendPutAsJson('/users/' . $users[0]['id'], ['name' => 'new name']);
-$I->sendDeleteAsJson('/users/' . $users[1]);
+$I->sendDeleteAsJson('/users/' . $users[1]['id']);
 {% endhighlight %}
 
 To enable steps with `AsJson` suffix enable `Codeception\Step\AsJson` step decorator in suite config:
@@ -119,7 +119,6 @@ and rebuild actions:
 
 ```
 php vendor/bin/codecept build
-
 ```
 
 > `sendGetAsJson`, `sendPutAsJson`, and others, are implemented with a [Step Decorator](https://codeception.com/docs/08-Customization#Step-Decorators). It adds `application/json` Content-Type, checks JSON response and returns JSON response as associative array.