[ImgBot] Optimize images

*Total -- 151.74kb -> 133.04kb (12.33%)

/UkncPpuMemoryIndirect.png -- 27.60kb -> 16.18kb (41.36%)
/UkncMemoryPlanes.png -- 9.05kb -> 6.42kb (29.02%)
/UkncCpuMemoryIndirect.png -- 14.46kb -> 12.66kb (12.44%)
/UkncPpuMemory.png -- 65.17kb -> 63.03kb (3.28%)
/UkncCpuMemory.png -- 35.47kb -> 34.75kb (2.05%)

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

Author: ImgBotApp