[ImgBot] Optimize images

*Total -- 6,658.11kb -> 3,773.61kb (43.32%)

/apps/static/screenshot/how-to-install.gif -- 6,642.17kb -> 3,757.71kb (43.43%)
/apps/chart-maker/chart-icon.svg -- 0.91kb -> 0.87kb (3.99%)
/apps/static/img/loading.gif -- 15.04kb -> 15.03kb (0.03%)

Signed-off-by: ImgBotApp <[email protected]>

apps/chart-maker/chart-icon.svg

@@ -1,11 +1 @@
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