[ImgBot] Optimize images

*Total -- 165.87kb -> 90.09kb (45.68%)

/Content/Cesium-for-Unreal-Logo-WhiteH.png -- 48.37kb -> 23.71kb (50.99%)
/Content/Cesium-for-Unreal-Logo-Micro-BlackV.png -- 43.97kb -> 21.81kb (50.39%)
/Content/Cesium-for-Unreal-Logo-BlackH.png -- 47.17kb -> 23.43kb (50.32%)
/Content/FontAwesome/globe-solid.png -- 1.32kb -> 0.89kb (32.2%)
/Resources/Icon128.png -- 6.56kb -> 4.94kb (24.76%)
/Content/Cesium-128x128.png -- 6.56kb -> 4.94kb (24.76%)
/Content/Cesium-64x64.png -- 3.04kb -> 2.30kb (24.31%)
/Content/FontAwesome/key-solid.png -- 0.86kb -> 0.69kb (19.34%)
/Content/FontAwesome/hands-helping-solid.png -- 0.89kb -> 0.71kb (19.29%)
/Content/FontAwesome/cloud-upload-alt-solid.png -- 0.83kb -> 0.68kb (17.74%)
/Content/FontAwesome/book-reader-solid.png -- 0.81kb -> 0.67kb (17.51%)
/Content/FontAwesome/sign-out-alt-solid.png -- 0.70kb -> 0.58kb (16.36%)
/Content/FontAwesome/plus-solid.svg -- 0.45kb -> 0.44kb (1.95%)
/Content/FontAwesome/sign-out-alt-solid.svg -- 0.57kb -> 0.56kb (1.55%)
/Content/FontAwesome/cloud-upload-alt-solid.svg -- 0.66kb -> 0.65kb (1.33%)
/Content/FontAwesome/key-solid.svg -- 0.66kb -> 0.65kb (1.33%)
/Content/FontAwesome/hands-helping-solid.svg -- 0.74kb -> 0.73kb (1.18%)
/Content/FontAwesome/book-reader-solid.svg -- 0.76kb -> 0.75kb (1.16%)
/Content/FontAwesome/globe-solid.svg -- 0.94kb -> 0.93kb (0.93%)

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

Author: ImgBotApp