MAC address add in command

test-cases/bluez-avrcp-volume.yaml

@@ -80,7 +80,7 @@ run:
     - "Run btmon before any connection happens:"
     - "$ sudo btmon  | grep -A4 'AV/C: Control'"
     - "Execute the test suite in another terminal:"
-    - $ ./bluez-avrcp-volume.sh -a 
+    - $ ./bluez-avrcp-volume.sh -a [MAC address]
     - "The user needs to give the MAC address of the phone to which the pairing has to be initiated if the phone has not been paired"
     - $ ./bluez-avrcp-volume.sh -s -a
     - "Skip pairing because the device is already paired. -a must be present when using this."