Update messages/whatsapp/send-audio.php

Co-authored-by: Karl Lingiah <[email protected]>

Author: SecondeJK

messages/whatsapp/send-audio.php

@@ -14,7 +14,7 @@
     'This is an audio file'
 );
 
-$sms = new \Vonage\Messages\MessageType\WhatsApp\WhatsAppAudio(
+$whatsApp = new \Vonage\Messages\MessageType\WhatsApp\WhatsAppAudio(
     TO_NUMBER,
     FROM_NUMBER,
     $audioObject