[ImgBot] Optimize images

*Total -- 480.43kb -> 372.71kb (22.42%)

/Creational_Pattern/Prototype/img.png -- 10.31kb -> 4.18kb (59.42%)
/Structural_Pattern/image.png -- 120.63kb -> 85.08kb (29.47%)
/Behavioral_Pattern/image.png -- 152.87kb -> 115.44kb (24.48%)
/Creational_Pattern/Builder/img.png -- 119.21kb -> 100.75kb (15.49%)
/Creational_Pattern/image.png -- 77.42kb -> 67.25kb (13.13%)

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

Author: ImgBotApp