[ImgBot] Optimize images

*Total -- 256.00kb -> 234.67kb (8.33%)

/assets/images/logo.png -- 10.00kb -> 6.10kb (38.96%)
/IND-Token.png -- 121.98kb -> 104.60kb (14.24%)
/aboutind.png -- 124.02kb -> 123.97kb (0.04%)

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

Author: ImgBotApp