Release notes language tweaks
Release notes language tweaks

PiperOrigin-RevId: 254156143

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