[ImgBot] Optimize images

*Total -- 1,293.21kb -> 1,257.96kb (2.73%)

/src/img/urbangarden-icon.png -- 6.15kb -> 2.68kb (56.42%)
/static/img/brooke-cagle-norsyxmhgpi-unsplash-1-.jpg -- 146.97kb -> 141.19kb (3.93%)
/static/img/hust-wilson-njhvhxs4c0u-unsplash.jpg -- 54.27kb -> 52.74kb (2.83%)
/static/img/klaudia-piaskowska-g3lrnieizq4-unsplash.jpg -- 674.44kb -> 658.89kb (2.31%)
/static/img/joanna-nix-walkup-p7zgmc33s0u-unsplash.jpg -- 411.38kb -> 402.46kb (2.17%)

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

Author: ImgBotApp