fix upload recording (#274)

lib/record/utils.js

@@ -5,7 +5,7 @@ const S3MultipartUploadStream = require('./s3-multipart-upload-stream');
 const getUploader = (key, metadata, bucket_credential, logger) => {
   const uploaderOpts = {
     bucketName: bucket_credential.name,
-    objectKey: key,
+    Key: key,
     metadata
   };
   try {