[ImgBot] Optimize images

*Total -- 480.99kb -> 442.58kb (7.99%)

/assets/ant_showcase.gif -- 348.31kb -> 319.96kb (8.14%)
/assets/show_pathfinding.gif -- 132.69kb -> 122.62kb (7.59%)

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

Author: ImgBotApp