Update README.md

Author: laolarou726

README.md

@@ -1,3 +1,5 @@
 # ProcessorLatencyTool
 
-This is a simple tool used to test the latency for the CPU. Fully cross-platform support. Powered by AvaloniaUI and managed C#.
+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)