update readme description

Author: Barqawiz

README.md

@@ -77,9 +77,9 @@ Output:<br>
 // 1- initiate the remote speech model
 RemoteSpeechModel model = new RemoteSpeechModel(apiKey, SpeechModels.google);
 
-// 2- call generateImages with any command !
+// 2- call generateEnglishText with any text
 SpeechInput input = new SpeechInput.Builder("Hi, I am Intelligent Java.").build();
-List<String> images = imageModel.generateImages(imageInput);
+byte[] decodedAudio = model.generateEnglishText(input);
 ```
 
 For full example check the code inside sample_code project.