Update README.md

Author: Swimburger

README.md

@@ -71,7 +71,7 @@ transcript = client.transcripts.submit(
 ```ruby
 uploaded_file = client.files.upload(file: '/path/to/your/file')
 # You can also pass an IO object or base64 string
-# uploaded_file = client.files.upload(file: File.new('/path/to/your/file')
+# uploaded_file = client.files.upload(file: File.new('/path/to/your/file'))
 
 transcript = client.transcripts.transcribe(audio_url: uploaded_file.upload_url)
 puts transcript.text