Update README.md

Co-authored-by: Geraint White <[email protected]>

Author: vtn-dev-prithipal

README.md

@@ -406,9 +406,13 @@ When Phone call is active, Android control the audio via connection service. so
 _This feature is available only on Android._
 
 ```js
-RNCallKeep.toggleAudioRouteSpeaker(uuid: string, routeSpeaker: boolean);
+RNCallKeep.toggleAudioRouteSpeaker(uuid, true);
 ```
 
+- `uuid`: string
+  - uuid of the current call.
+- `routeSpeaker`: boolean
+
 ### supportConnectionService (async)
 
 Tells if `ConnectionService` is available on the device (returns a boolean).