[ImgBot] Optimize images

*Total -- 2,455.79kb -> 2,312.07kb (5.85%)

/src/client/assets/img/VH_Space_Logo_White.png -- 109.12kb -> 65.61kb (39.87%)
/src/client/assets/img/VH_Space_Logo_Black.png -- 116.16kb -> 70.63kb (39.2%)
/src/client/assets/img/checked_box.svg -- 1.71kb -> 1.07kb (37.29%)
/src/client/assets/img/square_hackathon_logo.svg -- 4.78kb -> 3.36kb (29.83%)
/src/client/assets/img/sad_face.svg -- 0.99kb -> 0.83kb (16.67%)
/src/client/assets/img/unchecked_box.svg -- 0.99kb -> 0.84kb (15.06%)
/pics/vaken-org.png -- 197.90kb -> 169.43kb (14.39%)
/pics/vaken-sponsor.png -- 102.29kb -> 89.70kb (12.32%)
/src/client/assets/img/right_arrow.svg -- 0.17kb -> 0.16kb (4.05%)
/src/client/assets/img/notification.svg -- 87.48kb -> 84.53kb (3.37%)
/src/client/assets/img/back.svg -- 0.44kb -> 0.43kb (2.9%)
/src/client/assets/img/plane.svg -- 1.15kb -> 1.12kb (2.29%)
/src/client/assets/img/down_arrow.svg -- 0.46kb -> 0.45kb (1.49%)
/src/client/assets/img/email_icon.svg -- 0.33kb -> 0.33kb (0.88%)
/pics/vaken1.png -- 1,829.81kb -> 1,821.59kb (0.45%)
/src/client/assets/img/lock_icon.svg -- 0.69kb -> 0.69kb (0.43%)
/src/client/assets/img/github_logo.svg -- 1.32kb -> 1.32kb (0.3%)

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