[ImgBot] Optimize images

*Total -- 4,971.84kb -> 4,717.84kb (5.11%)

/clipdemo.gif -- 4,851.20kb -> 4,599.64kb (5.19%)
/Cliptest/xxxas.jpg -- 120.64kb -> 118.20kb (2.02%)

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

Author: ImgBotApp