[ImgBot] Optimize images

*Total -- 116.55kb -> 91.29kb (21.67%)

/dsa/Advance/image-3.png -- 13.57kb -> 5.67kb (58.19%)
/dsa/Advance/image-5.png -- 23.98kb -> 18.20kb (24.1%)
/dsa/Advance/image-4.png -- 24.54kb -> 19.08kb (22.26%)
/dsa/Advance/image-6.png -- 27.42kb -> 21.88kb (20.18%)
/docs/dsa/Queue/image.png -- 27.05kb -> 26.45kb (2.19%)

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

Author: ImgBotApp