Update release notes
Update release notes

PiperOrigin-RevId: 368822503

amzn/exoplayer-amazon-port,amzn/exoplayer-amazon-port,androidx/media,google/ExoPlayer,google/ExoPlayer,amzn/exoplayer-amazon-port,ened/ExoPlayer,androidx/media,ened/ExoPlayer,androidx/media,google/ExoPlayer,ened/ExoPlayer