[ImgBot] Optimize images (#749)

*Total -- 148.84kb -> 148.66kb (0.13%)

/form-nerd-logo.png -- 4.66kb -> 4.52kb (3.04%)
/docs/logo.svg -- 144.18kb -> 144.13kb (0.03%)

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Co-authored-by: Imgbot <help@imgbot.net>

Author: imgbot[bot]