Fix typo

Author: Andrews54757

chrome/player/players/mp4/MP4Player.mjs

@@ -83,9 +83,9 @@ export default class MP4Player extends EventEmitter {
     if (this.currentAudioTrack !== null) {
       const audioTrack = this.metaData.audioTracks[this.currentAudioTrack];
       if (audioTrack) {
-        const fixedCodec = audioTrack.codec;
+        let fixedCodec = audioTrack.codec;
         if (fixedCodec === 'Opus') {
-          fixedCode = 'opus';
+          fixedCodec = 'opus';
         }
         const audioCodec = 'audio/mp4; codecs=\"' + fixedCodec + '\"';
         this.audioSourceBuffer = new SourceBufferWrapper(this.mediaSource, audioCodec);