README.md in onnxruntime-0.5.0 vs README.md in onnxruntime-0.5.1

@@ -85,10 +85,11 @@
 ```ruby
 model.predict(input_feed, {
   log_severity_level: 2,
   log_verbosity_level: 0,
   logid: nil,
-  terminate: false
+  terminate: false,
+  output_type: :ruby       # :ruby or :numo
 })
 ```
 
 ## Inference Session API