[ImgBot] Optimize images

*Total -- 394.99kb -> 310.42kb (21.41%)

/dsa-solutions/lc-solutions/3100-3199/image-1.png -- 178.40kb -> 135.09kb (24.28%)
/dsa-solutions/lc-solutions/3100-3199/image.png -- 135.73kb -> 105.40kb (22.35%)
/docs/dsa/Hash/image.png -- 55.54kb -> 47.66kb (14.19%)
/docs/dsa/Hash/image-1.png -- 25.32kb -> 22.27kb (12.05%)

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