[ImgBot] Optimize images

*Total -- 2,179.73kb -> 2,043.50kb (6.25%)

/public/colored-logo.png -- 166.17kb -> 99.20kb (40.3%)
/public/meta-image.jpeg -- 99.83kb -> 96.37kb (3.46%)
/public/testimonials.png -- 1,913.73kb -> 1,847.93kb (3.44%)

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

Author: ImgBotApp