Update README.md

Author: ketanyekale

README.md

@@ -6,7 +6,7 @@ This is a reference application showcasing the integration of [**CometChat's And
 
 - Android Studio 
 - Android Device or emulator with Android version 6.0 or above.
-- Java or above.
+- Java 8 or above.
 - Sign up for a [CometChat](https://app.cometchat.com/) account to get your app credentials: _`App ID`_, _`Region`_, and _`Auth Key`_