Update README.md

Author: laolarou726

README.md

@@ -11,3 +11,9 @@ This is a simple tool used to test the latency of the CPU. Fully cross-platform
 ![image](https://github.com/user-attachments/assets/eb4fab89-cc53-4fe8-912a-7ab6fbea9a44)
 
 ![3369ad6e3f3066366135975419e072ed](https://github.com/user-attachments/assets/3a0e7de3-c04b-4004-bc0c-a1f9defeb92d)
+
+## :notebook: How to use?
+
+1. Download coresponding target platform from [Releases Page](https://github.com/laolarou726/ProcessorLatencyTool/releases)
+2. Decompress the file and run the program
+3. Click `Start Test` to start the test and get the result