[ImgBot] Optimize images

*Total -- 301.06kb -> 216.63kb (28.04%)

/source/images/4452ec02e17e8d59775c7391471af181.png -- 12.04kb -> 4.29kb (64.41%)
/source/images/faf87bc44c064b7d3a2fd230f61800e4.png -- 12.09kb -> 4.45kb (63.23%)
/source/images/8b4555785af3e3f51eece0258da89e7e.png -- 13.10kb -> 5.53kb (57.78%)
/source/images/1596702551777608.png -- 18.40kb -> 10.48kb (43.08%)
/source/theme/static/taboolib.png -- 15.15kb -> 10.86kb (28.34%)
/taboolib-docs-theme-archive/src/theme/static/taboolib.png -- 15.15kb -> 10.86kb (28.34%)
/source/images/Xnip2021-08-25_16-00-12.png -- 135.02kb -> 99.50kb (26.3%)
/source/images/Xnip2021-10-11_16-53-00.png -- 80.10kb -> 70.67kb (11.77%)

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

Author: ImgBotApp