Correct usage of upload sizes

Author: Acconut

README.md

@@ -40,7 +40,7 @@ TusUpload upload = new TusUpload(file);
 // a connection to the remote server and doing the uploading.
 TusUploader uploader = client.resumeOrCreateUpload(upload);
 
-// Upload the file in chunks of 1KB as long as data is available. Once the
+// Upload the file in chunks of 1MB as long as data is available. Once the
 // file has been fully uploaded the method will return -1
 while(uploader.uploadChunk(1024 * 1024) > -1) {
   // Calculate the progress using the total size of the uploading file and