[ImgBot] Optimize images

*Total -- 338.00kb -> 322.20kb (4.68%)

/assets/Rules Channel.png -- 168.27kb -> 158.48kb (5.82%)
/assets/Ticket Channel.png -- 169.73kb -> 163.72kb (3.54%)

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

Author: ImgBotApp