readme.md in appium_lib-8.2.1 vs readme.md in appium_lib-9.0.0

@@ -52,9 +52,10 @@
 
 - [Installing Appium on OS X](https://github.com/appium/ruby_console/blob/master/osx.md)
 - [Overview](https://github.com/appium/ruby_lib/blob/master/docs/docs.md) 
 - [Ruby Android methods](https://github.com/appium/ruby_lib/blob/master/docs/android_docs.md)
 - [Ruby iOS methods](https://github.com/appium/ruby_lib/blob/master/docs/ios_docs.md)
+    - [Tips for XCUITest for iOS](https://github.com/appium/ruby_lib/blob/master/docs/ios_xcuitest.md)
 - [Appium Server docs](https://github.com/appium/appium/tree/master/docs)
 
 #### Logging
 
 [Log level](https://github.com/appium/ruby_lib/blob/1673a694121d2ae24ffd1530eb71b7015d44dc52/lib/appium_lib/logger.rb) can be adjusted. The default level is `Logger::WARN`