README: mention basic keyboard input feature

re #4

README.md

@@ -18,7 +18,7 @@ If you have a general question, it's best to [ask in the community chat](https:/
 ## Features
 
 * Network export of device frame buffer with optional server-side scaling.
-* Injection of remote pointer events.
+* Injection of remote pointer and basic keyboard events.
 * Handling of client-to-server text copy & paste. Note that server-to-client copy & paste does not
   work in a generic way due to [Android security restrictions](https://developer.android.com/about/versions/10/privacy/changes#clipboard-data).
 * Handling of special keys to trigger 'Recent Apps' overview, Home button, Back button and Power button.