[ImgBot] Optimize images

*Total -- 889.96kb -> 534.25kb (39.97%)

/img/all-ip-addresses.png -- 412.71kb -> 235.31kb (42.98%)
/img/azure-ip-addresses.png -- 477.25kb -> 298.94kb (37.36%)

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

Author: ImgBotApp