[ImgBot] Optimize images

*Total -- 521.22kb -> 424.55kb (18.55%)

/img/Schermata del 2023-04-20 16-55-37.png -- 152.24kb -> 112.65kb (26%)
/img/2.png -- 152.24kb -> 112.65kb (26%)
/img/ok.png -- 66.55kb -> 51.07kb (23.27%)
/img/IMG-20230418-WA0021.jpg -- 150.19kb -> 148.18kb (1.34%)

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

Author: ImgBotApp