update readme

Author: wokaikaixinxin

README.md

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 Code is available at https://github.com/wokaikaixinxin/ai4rs
 
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+**NOTE: O2-RTDETR is earlier than YOLO 26 !!!** We publicly released some of our methods on ModelScope as early as October 2025. The hash values are shown in the image below.
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+<div align="center">
+  <img src="./release_on_modelscope.jpg" />
+</div>
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 # Bibtex
 
 ```bibtex