[ImgBot] Optimize images

*Total -- 20.65kb -> 8.99kb (56.45%)

/media/staff_logo.png -- 10.09kb -> 3.78kb (62.58%)
/media/logo.png -- 3.09kb -> 1.35kb (56.38%)
/media/banner.png -- 3.53kb -> 1.61kb (54.41%)
/media/banner.svg -- 3.94kb -> 2.26kb (42.63%)

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

media/banner.svg

@@ -1,99 +1 @@
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