[ImgBot] Optimize images

*Total -- 2,464.43kb -> 2,353.09kb (4.52%)

/data/images/surr.png -- 2.88kb -> 1.85kb (35.78%)
/web_ui.jpg -- 2,461.54kb -> 2,351.24kb (4.48%)

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