fix image link in readme

README.md

@@ -22,5 +22,5 @@ dictionary, resulting in a worse compression ratio.
 
 The leading LLM detection tools are [OpenAI's model detector (v2)](https://openai.com/blog/new-ai-classifier-for-indicating-ai-written-text), [GPTZero](https://gptzero.me/), and [Roberta](https://huggingface.co/roberta-base-openai-detector). Here are each of them compared with the LZMA detector across all the test datasets:
 
-![ROC curve of detection tools](https://github.com/Tail-Pipe/ai-detect/blob/main/ai_detect_roc.png?raw=true)
+![ROC curve of detection tools](https://github.com/thinkst/zippy/blob/main/ai_detect_roc.png?raw=true)