[ImgBot] Optimize images

*Total -- 7,581.01kb -> 7,301.29kb (3.69%)

/src/data/showcase/crop-recommendation-system.png -- 45.31kb -> 29.63kb (34.62%)
/static/img/blog-banner-4.jpg -- 438.90kb -> 401.90kb (8.43%)
/static/img/blog-banner-1.jpg -- 699.05kb -> 648.28kb (7.26%)
/static/img/blog-banner-2.jpg -- 567.83kb -> 528.44kb (6.94%)
/static/img/blog-banner-3.png -- 1,956.67kb -> 1,870.73kb (4.39%)
/static/img/blog-banner-5.png -- 1,056.73kb -> 1,016.18kb (3.84%)
/static/icons/facebook_icon.svg -- 0.68kb -> 0.67kb (2.58%)
/static/img/banner-2.png -- 1,397.65kb -> 1,392.13kb (0.39%)
/static/img/banner-1.png -- 1,418.18kb -> 1,413.34kb (0.34%)

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

Author: ImgBotApp