Update README.md

Author: laolarou726

README.md

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 This is a simple tool used to test the latency of the CPU. Fully cross-platform support. Powered by AvaloniaUI and managed C#.
 
 ![image](https://github.com/user-attachments/assets/eb4fab89-cc53-4fe8-912a-7ab6fbea9a44)
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+![3369ad6e3f3066366135975419e072ed](https://github.com/user-attachments/assets/3a0e7de3-c04b-4004-bc0c-a1f9defeb92d)