[ImgBot] Optimize images

*Total -- 105.05kb -> 87.54kb (16.67%)

/Network_scanner/windows.png -- 13.83kb -> 6.36kb (54.03%)
/Network_scanner/Linux.png -- 52.87kb -> 44.35kb (16.11%)
/HTTP-Server-Python3-by-Prajjwal-Datir/images/httpImg.png -- 38.35kb -> 36.83kb (3.97%)

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

Author: ImgBotApp