Update README.md

README.md

@@ -15,7 +15,7 @@ library_name: diffusers
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 <p align="center">
-    <img src="https://qianwen-res.oss-cn-beijing.aliyuncs.com/Qwen-Image/merge3.png" width="1600"/>
+    <img src="https://qianwen-res.oss-cn-beijing.aliyuncs.com/Qwen-Image/merge3.jpg" width="1600"/>
 <p>
 
 ## Introduction