Update call-recording-java.md

Remove "setExternalStorage" function because it does not exists and need to use "setRecordingStorage"

Author: ealmuneyeer

articles/communication-services/quickstarts/voice-video-calling/includes/call-recording-samples/call-recording-java.md

@@ -77,8 +77,7 @@ Start recording using your designated Azure Blob Storage to store the recorded f
         .setRecordingChannel(RecordingChannel.MIXED)
         .setRecordingContent(RecordingContent.AUDIO_VIDEO)
         .setRecordingFormat(RecordingFormat.MP4)
-        .setRecordingStorage(new AzureBlobContainerRecordingStorage("<YOUR_STORAGE_CONTAINER_URL>"))
-        .setExternalStorage(new BlobStorage("<Insert Container / Blob Uri>"));
+        .setRecordingStorage(new AzureBlobContainerRecordingStorage("<YOUR_STORAGE_CONTAINER_URL>"));
 
        // //start recording
        RecordingStateResult result = callRecording.start(recordingOptions);