Update release notes to include HLS init segment fix
Update release notes to include HLS init segment fix

PiperOrigin-RevId: 234600750

stari4ek/ExoPlayer,amzn/exoplayer-amazon-port,amzn/exoplayer-amazon-port,ened/ExoPlayer,superbderrick/ExoPlayer,androidx/media,ened/ExoPlayer,google/ExoPlayer,amzn/exoplayer-amazon-port,stari4ek/ExoPlayer,ened/ExoPlayer,androidx/media,superbderrick/ExoPlayer,saki4510t/ExoPlayer,stari4ek/ExoPlayer,google/ExoPlayer,saki4510t/ExoPlayer,superbderrick/ExoPlayer,google/ExoPlayer,saki4510t/ExoPlayer,androidx/media