Update index.js

index.js

@@ -312,7 +312,7 @@ async function ytmp3(url, bitrate = 'lowestaudio') {
           data = await ytdl.getInfo('https://www.youtube.com/watch?v=' + ID)
       let format = ytdl.chooseFormat(data.formats, { filter: 'audioonly', quality: bitrate });
       let buffer = await (await fetch(format.url)).arrayBuffer();
-      let upload = await uploadTemp(buffer, 'mp3')
+      let upload = await uploadTemp(buffer)
 
     if (format) {
       return {