readme.md in appium_lib-9.4.4

- old
+ new

@@ -8,9 +8,10 @@
 - `rake android['android/element/generic']` Run a single test.
 - `arc` Opens the Appium Ruby Console (arc). Enables interactive testing.
   - `gem install appium_console` if it's not installed already.
 
 api.apk is from [appium/android-apidemos](https://github.com/appium/android-apidemos)
+The way to generate api.apk is described in the repository.
 
 #### Documentation
 
 - [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) 