[ImgBot] Optimize images (#445)

*Total -- 1,209.15kb -> 887.62kb (26.59%)

/LyricsX/Assets.xcassets/AppIcon.appiconset/[email protected] -- 714.81kb -> 519.90kb (27.27%)
/LyricsX/Assets.xcassets/AppIcon.appiconset/icon_512x512.png -- 186.12kb -> 136.38kb (26.73%)
/LyricsX/Assets.xcassets/AppIcon.appiconset/[email protected] -- 186.12kb -> 136.38kb (26.73%)
/LyricsX/Assets.xcassets/AppIcon.appiconset/[email protected] -- 51.09kb -> 38.75kb (24.14%)
/LyricsX/Assets.xcassets/AppIcon.appiconset/icon_256x256.png -- 50.53kb -> 38.42kb (23.96%)
/LyricsX/Assets.xcassets/AppIcon.appiconset/icon_128x128.png -- 15.52kb -> 12.91kb (16.82%)
/LyricsX/Assets.xcassets/AppIcon.appiconset/[email protected] -- 4.96kb -> 4.88kb (1.69%)

Signed-off-by: ImgBotApp <[email protected]>

Co-authored-by: ImgBotApp <[email protected]>

Author: imgbot[bot]