[ImgBot] Optimize images

*Total -- 6,026.55kb -> 5,633.72kb (6.52%)

/assets/images/favicon.png -- 52.48kb -> 31.67kb (39.66%)
/assets/images/pic01.jpg -- 266.48kb -> 236.11kb (11.39%)
/assets/images/pic04.jpg -- 261.33kb -> 232.63kb (10.98%)
/assets/images/banner4.jpg -- 1,711.65kb -> 1,559.92kb (8.86%)
/assets/images/banner5.jpg -- 1,449.44kb -> 1,321.62kb (8.82%)
/assets/images/pic02.jpg -- 231.67kb -> 225.58kb (2.63%)
/assets/images/pic03.jpg -- 284.31kb -> 277.08kb (2.54%)
/assets/webfonts/fa-regular-400.svg -- 141.32kb -> 139.15kb (1.54%)
/assets/webfonts/fa-solid-900.svg -- 897.45kb -> 885.31kb (1.35%)
/assets/webfonts/fa-brands-400.svg -- 730.40kb -> 724.64kb (0.79%)

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

Author: ImgBotApp