[ImgBot] Optimize images

*Total -- 8,123.82kb -> 7,193.61kb (11.45%)

/docs/static/media/back1_v002.7777758f.png -- 4,060.52kb -> 3,595.43kb (11.45%)
/src/pages/MaterialDocsLanding/images/back1_v002.png -- 4,060.52kb -> 3,595.43kb (11.45%)
/docs/static/media/MaterialDocsLogoOverview.cbed2f78.svg -- 1.39kb -> 1.38kb (1.05%)
/src/pages/MaterialDocsLanding/images/MaterialDocsLogoOverview.svg -- 1.39kb -> 1.38kb (1.05%)

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Author: ImgBotApp