[ImgBot] Optimize images

[ImgBot] Optimize images

*Total -- 255.34kb -> 242.82kb (4.9%)

/images/default/gotosocial.svg -- 7.94kb -> 4.95kb (37.69%)
/images/default/plume.png -- 18.09kb -> 12.91kb (28.64%)
/images/default/corgidon.png -- 34.83kb -> 32.17kb (7.65%)
/images/default/koyuspace.png -- 1.12kb -> 1.08kb (4.34%)
/images/friendica-maskable.svg -- 0.39kb -> 0.39kb (1.49%)
/images/friendica-maskable-512.png -- 5.15kb -> 5.08kb (1.4%)
/mods/fpostit/friendica.svg -- 0.42kb -> 0.42kb (1.38%)
/images/friendica.svg -- 0.42kb -> 0.42kb (1.38%)
/images/friendica-banner.jpg -- 91.27kb -> 90.38kb (0.97%)
/images/diaspora-banner.jpg -- 83.38kb -> 82.77kb (0.73%)
/images/default/hometown.png -- 12.31kb -> 12.26kb (0.38%)

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