[ImgBot] Optimize images

*Total -- 5,033.73kb -> 3,101.29kb (38.39%)

/assets/me.jpg -- 4,096.24kb -> 2,372.76kb (42.07%)
/assets/js_demo.png -- 538.26kb -> 401.35kb (25.44%)
/assets/py_demo.png -- 380.95kb -> 310.58kb (18.47%)
/assets/augmented_smoke_image.jpg -- 18.29kb -> 16.61kb (9.18%)

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

Author: ImgBotApp