[ImgBot] Optimize images

*Total -- 536.29kb -> 446.69kb (16.71%)

/images/A00.png -- 171.26kb -> 131.15kb (23.42%)
/images/A4.png -- 97.04kb -> 81.76kb (15.74%)
/images/A1.png -- 85.04kb -> 72.05kb (15.28%)
/images/A2.png -- 107.38kb -> 91.34kb (14.93%)
/images/A0.png -- 75.58kb -> 70.39kb (6.86%)

Signed-off-by: ImgBotApp <ImgBotHelp@gmail.com>